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- Saint Tabitha the Almsgiver, the widow resurrected by the Apostle Peter (Acts 9:36-43) (1st century) 25 October
- Hieromartyr Tadros, Bishop of Edessa, at Jerusalem (691) 20 March
- Saint Talarican, probably Pictish, St Talarican was a bishop in Scotland and several churches were dedicated to him (8th century) West, before the Schism 30 October
- Saint Talida, Abbess at Antinoë, and her disciple Taora (5th century) 5 January
- Saint Talmach, a disciple of St Barr at Lough Erc in Ireland, and founder of a monastery (7th century) West, before the Schism 14 March
- Saint Tamar of Georgia, Queen (1213) 1 May
- New Martyr Tamara (Satsi), Abbess, of Cheboksara (Chuvashia) (1942) 18 April
- Saint Tanca, a young girl near Troyes in France who was martyred defending her virginity (c. 637) West, before the Schism 10 October
- Hieromartyr Tanco of Verden, Bishop of Verden (815) West, before the Schism 16 February
- Saint Tanco of Werden (Tancho, Tatta), Abbot of Amalbarich Abbey in Saxony and eventually Bishop of Werden in Germany, martyred by pagans (808) West, before the Schism 6 February
- Righteous Tarasius the Hermit and Wonderworker of Lycaonia 7 May
- Righteous Tarasius the Wonderworker, of Lycaonia 9 March
- Righteous Tarasius the Wonderworker, of Lycaonia. () 8 March
- Saint Tarasius, Patriarch of Constantinople (806) 25 February
- Martyr Tarcisius, at Rome, seized by a heathen mob and preferred to die rather than expose the sacred mysteries to profanation (c. 253–260) West, before the Schism 15 August
- Martyr Tarcisius, at Rome, under Valerian and Gallienus (c. 253–260) 14 August
- Saint Tarsicia of Rodez, an Anchoress who lived near Rodez, sister of St. Ferréol of Uzès (600) West, before the Schism 15 January
- Saint Tarsila, an aunt of Saint Gregory the Great, sister of Saint Emiliana and niece of Pope Felix III; she led a life of seclusion and asceticism in her... (581) West, before the Schism 24 December
- Saint Tassach, one of St Patrick's earliest disciples and first Bishop of Raholp, Ireland (c. 495) West, before the Schism 14 April
- Saint Tassilo, Duke of Bavaria and a great monastic benefactor, became a monk at Jumièges Abbey, reposed at Lorsch Abbey (c. 794) West, before the Schism 13 December
- Saint Tathai (Tathan, Tathaeus, Athaeus), Abbot of Llantathan (early 6th century) West, before the Schism 26 December
- Virgin-martyr Tatiana Chekmazovoy (1942) 28 September
- Virgin-martyrs Tatiana Gribkov and Natalia Kozlov (1937) 1 September
- Virgin-Martyr Tatiana Grimblit (1937) 10 September
- Virgin Martyr Tatiana of Rome, and those who suffered with her (226-235) 12 January
- Righteous Tatiana, Nun 5 January
- Martyr Tation, at Claudiopolis (Bithynia) (305) 24 August
- Saint Tatwine, the tenth Archbishop of Canterbury (734) West, before the Schism 30 July
- Saint Taurinus, first Bishop of Evreux, Gaul (c. 412) West, before the Schism 11 August
- New Martyr Tavrion (Tolokontsev), Monk, of Veliki Ustiug (1939) 25 May
- Saint Tbeli Abuserisdze of Khikhuni, Adjara (13th century) 17 August
- Virgin-martyrs Tecusa, Alexandra, Claudia, Matrona, Polactia, Euphrosyne, Julia, Euphrasia, Faina, and Athanasia, of Ancyra (303) 6 November
- Saint Teilo (Theliau, Teilan, Dillo, Dillon), Bishop of Llandaff, Wales (6th century) West, before the Schism 9 February
- Hieromartyr Telesphorus, a Greek who was Pope of Rome for ten years (c. 136) West, before the Schism 5 January
- Saint Telesphorus, Pope of Rome (136) 22 February
- Ten companions with Hieromartyr Polychronius (4th century) 7 October
- Holy Ten Martyrs of Crete (250) 23 December
- Ten Martyrs of Gaza, at Jerusalem (638) 10 November
- The Holy Ten Martyrs of Halki, who defended the wonderworking icon of the Savior, made of copper 9 August
- Holy Ten Martyrs of Phoenicia, by the sword 16 March
- Ten Soldier-Martyrs of Rome, buried on the Via Lavicana (c. 250 ?) West, before the Schism 10 February
- The holy Ten thousand Martyrs, in Antiochia (249-251) 1 June
- The Ten Venerable ascetics of Egypt 8 August
- Holy Ten Virgin Martyrs of Nicomedia, who had their eyes put out and their sides run through (c. 286 – 305) 31 December
- Saint Ténénan, Bishop of Léon (7th century) West, before the Schism 16 July
- New Hieromartyr Teodor (Nestorović) of Vršac, Bishop of Vršac in Banat, Serbia (1594) 16 May
- Martyrs Terence (Terentius), Vincent, Emilian, and Bebaia, by the sword 11 December
- Martyrs Terence and Neonilla, of Syria, and their children (249) 28 October
- Saint Terence of Metz, sixteenth Bishop of Metz in the east of France (520) West, before the Schism 29 October
- Martyrs Terence, Africanus, Maximus, Pompeius, and 36 others, at Carthage (250) West, before the Schism 28 October
- Martyrs Terence, Africanus, Maximus, Pompeius, and 36 others, including Zeno, Alexander, and Theodore, at Carthage (250) 10 April
- Hieromartyr Terentian, Bishop of Todi in Umbria in Italy, under Hadrian (118) West, before the Schism 1 September
- Saint Ternan, an early missionary bishop among the Picts in Scotland (5th century) West, before the Schism 12 June
- Saint Ternatius (Terniscus), eleventh Bishop of Besançon in the east of France (c. 680) West, before the Schism 8 August
- Apostles Tertius (Terence), Mark, Justus, and Artemas, of the Seventy Disciples (1st century) 30 October
- Hieromartyr Tertius of Iconium (Terence), Apostle of the Seventy, Bishop of Iconium (1st century) 21 June
- Saint Tertullian, eighth Bishop of Bologna in Italy (490) West, before the Schism 27 April
- Saint Tertullinus, a priest, martyred in Rome under Valerian two days after his ordination (257) West, before the Schism 4 August
- Saint Tetricus of Langres, Bishop of Langres and uncle of St Gregory of Tours (572) West, before the Schism 20 March
- Saint Tetricus, Abbot of St Germanus in Auxerre, then Bishop of Auxerre by popular acclamation, murdered in his sleep (707) West, before the Schism 12 April
- Saint Tetricus, Bishop of Langres in Gaul (572) West, before the Schism 18 March
- Saint Tetta, Abbess of Wimborne in Dorset, who sent nuns from her 500-strong convent to St Boniface (c. 772) West, before the Schism 28 September
- Martyr Thaddeus 22 November
- Apostle Thaddeus of Edessa, one of the Seventy Apostles (44) 21 August
- Venerable Thaddeus the Confessor of the Studion Monastery (818) 29 December
- New Hieromartyr Thaddeus Uspensky, Archbishop of Tver (1937) 18 December
- Saint Thaddeus, Archimandrite, of Svatogorsk Monastery (1758) 25 May
- Blessed Thais (Taisia) of Egypt (5th century) 10 May
- Venerable Thaïs of Egypt (Taisia), repentant courtesan (4th century) 8 October
- Venerable Saints Thalassius and Limneus hermits near Cyrrhus (5th century) 22 February
- Saint Thalassius the Myrrh-gusher, of Libya (648) 20 May
- Saint Thalelæus of Syria, hermit, of Gabala in Syria (c. 460) 27 February
- Martyrs Thalelaeus the Unmercenary, and his companions Alexander and Asterius, at Aegae in Cilicia (284) 20 May
- Martyrs Thallelaius and Anthimus, by the sword 22 November
- Martyrs Tharsicius, Zoticus, Cyriacus, and their companions, at Alexandaria 31 January
- Martyrs Thathuil and Bebaia of Edessa (c. 116) 4 September
- Martyr Thathuil, by hanging from an apple tree 4 August
- Venerable Thaumastos (the Wonderworker) (6th century) 24 April
- Martyr Thea, by the sword 23 February
- Martyr Theagenes, by fire 3 October
- Saint Thecla, Abbess, of Ochsenfurt, Germany (c. 790) West, before the Schism 15 October
- Saint Thekla of Pereyaslavl, nun, (mother of St. Daniel, Abbot of Pereyaslavl-Zalesski +1540) (16th century) 25 May
- Virgin-martyrs Thekla, Mariamne, Martha, Mary, and Ennatha, five nuns beheaded in Persia under Shapur II (4th century) 26 September
- Martyr Themistocles of Myra in Lycia (251) 21 December
- Saint Theneva (Thenew, Thenova, Dwynwen), the mother of St Kentigern and patron-saint of Glasgow in Scotland together with him (7th century) West, before the Schism 18 July
- Saint Theobald of Vienne (Thibaud), Archbishop of Vienne (970-1001) West, before the Schism 21 May
- New Martyr Theocharis of Neapolis, Cappadocia (1740) 20 August
- Martyr Theocles, by the sword 14 September
- Saint Theocleta the Wonderworker, of Asia Minor (840) 21 August
- Venerable Theoclite the Wonderworker, of Optimaton (Theme of the Optimatoi) (ca. 842) 3 August
- Venerable Theocteristus (Theosteriktos), Abbot of Symbola Monastery on Mount Olympus, Bithynia (8th century) 10 November
- Venerable Martyr Theocteristus, Abbot of Pelekete Monastery near Prusa (8th century) 17 February
- Martyr Theocteristus, Abbot of Pelekete Monastery near Prusa (8th century) 29 February
- Venerable Theoctiste of Lesbos, of the Monastery Panagia "Ekatontapyliani" (Hundred Doors) in Paros (881) 9 November
- Saint Theoctistus (Feoktist), Archbishop of Novgorod (1310) 23 December
- Venerable Theoctistus (Theoktistos) the Confessor, Patrician (855) 20 November
- New Hieromartyrs Theoctistus Khoperskov, Leonid Viktorov, and Nicholas Rodimov, Priests (1937) 28 December
- Venerable Theoctistus of Palestine, fellow ascetic with Venerable Euthymius the Great (451) 3 September
- New Hieromartyrs Theoctistus Smelnitsky and Alexander Tetiuyev, Priests (1937) 20 September
- Venerable Theoctistus, Abbot of Cucomo (Coucouma, Coucoumis) Monastery, Sicily (800) West, before the Schism 4 January
- Saint Theoctistus, Bishop of Chernigov (1123) 5 August, 6 August
- Martyr Theoctistus, by the sword 4 February, 3 October
- Saint Theoctistus, monk from Tekoa, Palestine 13 May
- Saint Theodard of Maastricht (c. 670) West, before the Schism 10 September
- Saint Théodard, Archbishop of Narbonne (893) West, before the Schism 1 May
- Saint Theodemir of Córdoba, a monk martyred in Córdoba in Spain under Abderrahman II (851) West, before the Schism 25 July
- Saint Theoderic of Metz, Bishop of Metz in Germany (984) West, before the Schism 7 September
- Saint Theodichildis (Theodehilda, Telchildis), a nun at Faremoutiers Abbey in France, she became the first Abbess of Jouarre (c. 660) West, before the Schism 28 June
- Virgin-martyr Theodora and Martyr Didymus the Soldier, of Alexandria (304) 5 April
- Venerable Theodora of Alexandria (491) 11 September
- Venerable Theodora of Alexandria, instructress of nuns (5th century) 12 January
- Venerable Theodora of Arta, Queen of Arta, wife of Despot Michael II of Epirus (c. 1275) 11 March
- Venerable Theodora of Caesarea in Cappadocia (755) 30 December
- Venerable Theodora of Constantinople, Nun (940) 30 December
- Virgin-martyr Theodora of Palestine (Theodosia of Tyre) (308) 2 April
- Saint Theodora of Sihla (18th century) 7 August
- Venerable Theodora of Thessaloniki (886) 5 April
- Holy Martyr Theodora of Vasta, in the central Peloponnese (10th century) 11 September
- Saint Theodora-Bassa, princess of Novgorod (1378) 16 April
- Saint Theodora, a noble lady of Rome devoted to the service of the martyrs during the persecution of Diocletian (c. 305) West, before the Schism 17 September
- Virgin-martyr Theodora, and Martyr Didymus the Soldier, of Alexandria (304) 27 May
- Saint Theodora, nun, of Thessaloniki, who was from Aegina (892) 29 August
- Saint Theodora, wife of Emperor Theophilus the Iconoclast (867) 11 February
- New Hieromartyr Theodore (1940) 1 October
- New Hieromartyr Theodore (Bogoyavlensky), Hieromonk, of Vostryakovo, Moscow (1943) 6 July
- Saint Theodore (in monasticism Theodosius) of the Kiev Caves, Prince of Ostrog in Volhynia (1483) 11 August, 28 August
- New Hieromartyr Theodore (Pozdeyevsky), Archbishop (1938) 21 March
- New Hieromartyr Theodore (Pozdeyevsky), Archbishop of Volokolamsk (1937) 10 October
- Theodore (Smirnov), Bishop of Penza, and with him Priests Basil Smirnov and Gabriel Archangelsky (1937) 22 August
- Saint Theodore (Theudar), a priest and disciple of St Caesarius of Arles, also abbot of one of the monasteries of Vienne in France (c. 575) West, before the Schism 29 October
- New Hieromartyr Theodore Abrosimov (1941) 20 July
- Saint Theodore and Companions, Abbot of Crowland in England, martyred by the Danes (869) West, before the Schism 9 April
- Saints Theodore and Euprepius, and two men named Anastasius (7th century), confessors and disciples of Saint Maximos the Confessor 20 September
- Martyrs Theodore and George 21 July
- Hieromartyr Theodore and martyr Pausilippus of Thrace, by the sword (c. 117-138) 15 April
- Saints Theodore and Paul, Abbots, of Rostov (1409) 22 October
- New Hieromartyr Theodore Bogoyavlensky, Priest (1937) 27 September
- New Hieromartyrs Theodore Dorofiev of Moscow, Alexei Speransky of Moscow, John Glazkov of Alma-Ata, Sergius Amanov, John Khrustalev, Sergius Brednikov... (1937) 27 November
- Great-martyr Theodore Gabras of Atran in Chaldia, of Pontus (1098) 2 October
- Venerable Theodore Graptus (the Branded) of Palestine and Bithynia, Confessor, brother of Saint Theophanes the Confessor (840) 27 December
- New Hieromartyr Theodore Grudakov, Priest (1940) 14 November
- Martyr Theodore Gusev (1940) 19 January
- Hieromartyr Theodore I, Patriarch of Alexandria (609–610) 3 December
- Saint Theodore I, Patriarch of Constantinople (686) 27 December
- Blessed Theodore III, Archbishop of Rostov (1394) 28 November
- New Martyr Theodore Ivanov of Tobolsk (1937) 29 August
- New Hieromartyr Theodore Kallistov, Archpriest (1937) 21 August
- New Hieromartyrs Theodore Kolierov, Priest, and with him Martyrs Ananius Boikov and Michael Boldakov (1929) 16 November
- New Hieromartyrs Theodore Lebedev, John Prudentov, and Nicholas Zhitov, Priests (1937) 12 September
- New Hieromartyr Theodore Nedosekin of Moscow, Priest (1942) 17 April
- New Hieromartyr Theodore of Adjara, Hieromonk, at Mt. Athos (1822) 17 February
- Saint Theodore of Ajareli 26 January
- Martyr Theodore of Alexandria 12 September
- Martyr Theodore of Antioch (after 363) 23 November
- New Martyr Theodore of Byzantium, at Mytilene (1795) 17 February
- Venerable Theodore of Constantinople, founder and abbot of the Monastery of Chora (c. 595) 8 January
- Hieromartyr Theodore of Cyrene, Bishop of Cyrene in Libya, and with him Martyrs Cyprilla, Aroa, and Lucia (310) 4 July
- Saint Theodore of Edessa (Theodore the Savvaitis), Bishop of Edessa (848) 9 July
- Martyrs Theodore of Kiev and his son John, the Varangians, at Kiev (983) 12 July
- Venerable Theodore of Kythera, ascetic (922) 12 May
- Saint Theodore of Pavia, Bishop of Pavia (778) West, before the Schism 20 May
- Martyrs Theodore of Perge in Pamphylia, his mother Philippa, and Dioscorus, Socrates, and Dionysius (c. 138-161) 19 April, 21 April
- Saint Theodore of Tarsus, Archbishop of Canterbury (690) West, before the Schism 19 September
- New Martyr Theodore of the Dardanelles (1690) 2 August
- Hieromartyr Theodore of Tyre, Bishop of Tyre (c. 361-363) 5 June
- New Martyr Theodore Sladić of Komogovina (1788) 2 March
- New Hieromartyrs Theodore Smirnov and Gabriel Archangelsky, Deacons (1938) 22 June
- Great martyr Theodore Stratelates "the General" of Heraclea (319) 8 February
- Venerable Theodore the Confessor (Theodore the Studite), Abbot of the Studion (826) 11 November
- Saint Theodore the Confessor, Bishop of Ancyra (8th-9th century) 3 November
- Righteous Theodore the Fool for Christ of Novgorod (1392) 19 January
- Saint Theodore the Philosopher of Kamske, martyred by Mongols (1323) 21 April
- Venerable Theodore the Sabbaite, Archbishop of Edessa in Mesopotamia (848) 19 July
- Saint Theodore the Sacrist, a holy man and contemporary of Saint Gregory the Great in Rome (6th century) West, before the Schism 26 December
- Saint Theodore the Sanctified of Tabennisi, disciple of Saint Pachomios the Great (367) 16 May
- Venerable Theodore the Silent, of the Kiev Caves Monastery (13th century) 17 February
- Venerable Theodore the Sykeote, Bishop of Anastasiopolis in Galatia (613) 22 April
- Great-martyr Theodore the Tyro (c. 306) 17 February
- Venerable Theodore the Wonderworker, Bishop of Tamassos, Cyprus (2nd century) 4 October
- Venerable Theodore the Wonderworker, hermit of the Jordan (6th century) 5 June
- New Hieromartyr Theodore Tonkovid, Priest of Lovets, Pskov (1942) 25 July
- Venerable Theodore Trichinas ("the Hair-Shirt Wearer"), hermit near Constantinople (400) 20 April
- Saint Theodore Yaroslavich of Novgorod, brother of St. Alexander Nevsky (1233) 5 June
- Venerable Theodore, Abbot of Sanaxar Monastery (1791) 19 February
- Martyrs Theodore, Ammianus, Julian, Oceanus, Centurionus, of Nicomedia (288) 4 September
- Martyr Theodore, at Antioch, by beheading (361) 24 November
- Saint Theodore, Bishop of Rostov and Suzdal (c. 1023) 8 June
- Saint Theodore, Bishop of Theodosiopolis in Armenia (end of 6th century) 28 November
- Martyr Theodore, by the sword 1 August
- Saint Theodore, Fool-for-Christ 25 February
- New Hieromartyr Theodore, Priest, of Kvelta, Georgia (1609) 8 June
- Martyr Theodore, right-believing prince of Starodub (1330) 21 June
- Hieromartyr Theodore, with Irenaeus the Deacon, and Serapion and Ammonius the lectors, in Pentapolis in Libya (304) 26 March
- Saint Theodoret of Antioch, Hieromartyr (361–363) 17 May
- Martyr Theodoret, at Antioch (362) 22 October
- Hieromartyr Theodoretus, Bishop, of Antioch, by beheading (361-363) 3 March
- Blessed Theodoretus, Enlightener of the Laps in Solovki (1571) 17 August
- Hieromartyr Theodoretus, priest, of Antioch (361-363) 8 March
- Saint Theodoric (Thierry, Theodericus), Abbot of Mont d'Or near Rheims in the north of France; priest and disciple of the blessed Bishop Remigius (c. 533) West, before the Schism 1 July
- Saint Theodoric II of Orleans, monk at Saint-Pierre-le-Vif in Sens in France, became Bishop of Orleans (1022) West, before the Schism 27 January
- Saint Theodoric, Bishop of Cambrai-Arras in the north of France c 830-863 West, before the Schism 5 August
- Saint Theodoritus, Archbishop of Ryazan and Murom (1617) 10 September
- Venerable Theodorus, and Venerable Archimandrite Agapius of Apamea in Syria 11 January
- Saint Theodosia (Fedosia, in monasticism Euphrosyne), princess of Vladimir, wife of Jaroslav Vsevolodovich, mother of St. Alexander Nevsky (1244) 4 May
- Venerable Virgin-martyr Theodosia of Constantinople (730) 29 May
- Virgin-martyr Theodosia of Tyre (308) 3 April, 29 May
- Saints Theodosia the Princess (daughter of Emperor Hadrian), and the Eunuch Gerontios (c. 117-138) 13 April
- New Hieromartyr Theodosius Belenky, Priest, at Chimkent (1938) 29 December
- New Hieromartyr Theodosius Boldiriev, Priest of Tver (1937) 16 December
- Saint Theodosius I the Great, Roman Emperor (395) 17 January
- Saint Theodosius Levitsky, priest of Balta, Odessa (1845) 9 March
- Saint Theodosius of Auxerre, Bishop of Auxerre in France c 507-516, who assisted in 511 at the First Council of Orléans West, before the Schism 17 July
- Hieromartyr Theodosius of Brazi Monastery, Metropolitan of Moldavia (1694) 22 September
- Saint Theodosius of Chernigov, Archbishop of Chernigov (1696) 5 February
- Venerable Theodosius of Mount Athos, Metropolitan of Trebizond (1392) 11 January
- Venerable Theodosius of Skopelos in Cilicia (c. 421) 5 February
- Venerable Theodosius of Tarnovo (1363) 27 November
- Saint Theodosius of the Caucasus, Schema-Igumen (Hieroconfessor Theodosius Of Minvody) (1948) 26 July
- Saint Theodosius of Tryglia, Abbot 1 January
- Venerable Theodosius the Great, the Cenobiarch (529) 11 January
- Venerable Theodosius the New, Igumen of Orov 8 August
- Venerable Theodosius the New, of the Peloponnese, the healer (862) 7 August
- Venerable Theodosius the Wonderworker, Abbot of the Monastery of the Saviour in Totma, Russia (1568) 23 March
- Saint Theodosius the Younger, the pious emperor (450) 29 July
- Venerable Theodosius, Abbot of the Kiev Far Caves Monastery, and Founder of Cenobitic Monasticism in Russia (1074) 3 May
- Saint Theodosius, Abbot, of Manyava Skete, Ukraine (1629) 24 September
- Venerable Theodosius, Ascetic of Rhosus and Antioch, Wonderworker (c. 412) 11 January
- Saint Theodosius, Bishop of Vaison in France and predecessor of St Quinidius (554) West, before the Schism 14 February
- Martyr Theodosius, by the sword 13 April
- Venerable Theodosius, founder of Totma Monastery, Vologda Oblast (1568) 28 January
- Venerable Theodosius, Hieromonk of Svyatogorsk Monastery (1850) 20 October
- Venerable Theodosius, monastic founder at Mt. Kelifarevo (1363), and his disciple St. Romanus (c. 1370), of Turnovo, Bulgaria 17 February
- Saint Theodosius, Stylite, of Edessa (9th century) 9 July
- Martyr Theodota (712) 3 July
- Martyr Theodota and her three sons in Bithynia (c. 304) 29 July
- Martyr Theodota of Cappadocia, at Nicaea (230) 17 September
- Martyr Theodota of Philippi 29 September
- Saint Theodota, mother of the first Saints Cosmas and Damian (3rd century) 2 January
- Venerable Theodotos, Igumen of the "Monastery of St. Publius" 25 January
- Martyrs Theodotus and Theodota, martyred with St. Hyacinth at Caesarea in Cappadocia (108) 4 July
- Martyr Theodotus of Ancyra (303) 7 November
- Martyr Theodotus of Ancyra, and with him seven virgin-martyrs 18 May
- Hieromartyr Theodotus of Ancyra, Bishop (303) 7 June
- Saint Theodotus, Bishop of Cyrene (c. 307-323) 19 January
- Hiero-Confessor Theodotus, Bishop of Cyrenia in Cyprus (c. 326) 2 March
- Saint Theodotus, Bishop of Ephesus, reposed in peace 12 October
- Martyr Theodotus, by the sword 1 January
- Saint Theodotus, monk of Glinsk Hermitage (1859) 16 July
- Venerable Theodoulos (Theodoulus) the Stylite, Eparch of Constantinople (c. 440) 3 December
- Venerable Theodoulos of Cyprus, Monk 3 December
- Hieromartyr Theodoulos the Sinaite (1822) 17 March
- Martyr Theodoulos, at Caesarea Palestina (308) 17 February
- Martyr Theodula and her companions Helladius, Theodoulos, Boethius, Evagrius, and Macarius, of Anazarbus, Cilicia (c. 304) 18 January
- Martyr Theodula of Anazarbus in Cilicia, and with her Martyrs Helladius, Macarius, Boethos, and Evagrius (304) 5 February
- Saint Theodulphus (Thiou), third Abbot of Lobbes Abbey in Belgium (776) West, before the Schism 24 June
- Venerable Theodulus (Theodoulos), son of Venerable Nilus of Sinai (5th century) 14 January
- Saint Theodulus of Grammont (Theodore, Yoder), an early Bishop of Valais, who was much revered in Switzerland and Savoy (4th century) West, before the Schism 17 August
- Martyrs Theodulus, Anesius, Felix, Cornelia and Companions, in North Africa West, before the Schism 31 March
- Martyrs Theodulus, Reader, and Agathopodes, Deacon, and those with them, at Thessaloniki (c. 303) 5 April
- Martyr Theoeidos 5 January
- Saint Theofrid (Theofroy, Chaifre), Abbot of Carmery-en-Velay (Monastier-Saint-Chaffre), martyred by invading Saracens (728) West, before the Schism 19 October
- Saint Theofrid (Theofroy), a monk at Luxeuil in France who became Abbot of Corbie, and a Bishop (c. 690) West, before the Schism 26 January
- New Hieromartyr Theogenes (Kozyrev), Archimandrite, of Chimkent, Kazakhstan (1939) 30 June
- Hieromartyr Theogenes, Bishop of Parium on the Hellespont (c. 320) 2 January
- Saint Theognius, Bishop of Bethelia near Gaza (523) 15 February
- Saint Theognostus of Kiev, the Greek Metropolitan of Kiev and all Rus' (1353) 14 March
- Saint Theokletos, Archbishop of Lacedaemon (Sparta) (870) 1 December
- Venerable Theoklitos, a Magistros from Constantinople who retired from the world and took the monastic habit, becoming an ascetic on Mt. Olympos 27 August
- New Martyr Blessed Theoktista Mikhailovna, Fool-for-Christ, of Voronezh (1936) 22 February
- Venerable martyr Theoktistos, of the Great Lavra of St. Sabbas the Sanctified, reposed in peace (797) 13 March
- Saint Theolepte, martyr 1 November
- Saint Theoleptus of Philadelphia, Metropolitan of Philadelphia (1322) 25 June
- Venerable Theonas, Metropolitan of Thessaloniki (1541) 4 April
- Venerable Saints Theonas, Symeon, and Fervinus (Phorbinus) 4 April
- Saints Theonas, Symeon, and Phorbinus, of Egypt (4th century) 5 April
- Martyr Theonas, with Two Children 1 February
- Saint Theonestus, by tradition Bishop of Philippi, later martyred in Altino in Italy (425) West, before the Schism 30 October
- Righteous Theopemptos, Monk 2 January
- Martyr Theopemptus and four others, by the sword 11 June
- Martyr Theopemptus and the Six Martyrs of Phrygia, by fire (c. 305) 7 February
- Hieromartyr Theopemptus, Bishop of Nicomedia, and Martyr Theonas, former sorcerer (303) 5 January
- New Hieromartyr Theophan (Grafov), Hierodeacon, of Borisoglebsk Monastery, Vladimir (1938) 5 March
- New Hieromartyr Theophan (Tuliakov), Metropolitan of Lipetsk and Belorussia (1937) 21 September
- New Hieromartyr Theophan Beatovich, Hieromonk of Kosjerev Monastery, Montenegro (1941) 24 December
- Saint Theophan the Recluse, Bishop of Tambov (1894) 6 January
- Venerable Theophan the Recluse, Bishop of Tambov (1894) 10 January
- Venerable Theophan, Schema-Archimandrite of Nizhyn and the Rykhlovsk Monastery (ru), Ukraine (1977) 5 January
- Venerable Theophanes Graptus ("the Branded"), Confessor and Hymnographer, Bishop of Nicaea (850) 11 October
- New Hieromartyr Theophanes Ilminsky, Bishop of Perm and Solikamsk, and with him two priests and five laymen, martyrs (1918) 11 December
- Venerable Theophanes of Docheiariou monastery, the New Wonderworker (16th century) 19 August
- Saint Theophanes of Vatopedi, Metropolitan of Peritheorion (near Xanthi) (14th century) 3 May
- Venerable Theophanes the Confessor of Sigriane (818) 12 March
- Saint Theophanes the Merciful of Gaza 29 September
- Saint Theophanes, Archbishop of Cyprus (7th century) 12 May
- New monk-martyr Theophanes, at Constantinople (1559) 8 June
- Saint Theophanes, Bishop of Solea (Solia), Cyprus, later a hermit in the Troodos Mountains, the Outpourer of Myrrh (1550) 12 May
- Venerable Theophanes, Confessor and Faster, of Mount Diabenos (299) 9 September
- Saint Theophanes, faster, of the Kiev Caves (12th century) 11 October
- Saints Theophanes, Soleas and Jonah of Pergamos, Cyprus (12th century) 11 October
- Saint Theophano Basarab, first known Romanian nun (1352) 28 October
- Saint Theophil, fool-for-Christ, of Svyatogorsk Monastery (1868) 30 January
- Venerable Theophilos the Confessor, Archbishop of Ephesus 25 September
- Theophilos the Martyr, and those with him, in Crete 31 March
- Hieromartyr Theophilos, by the sword 4 July
- Venerable Theophilus (1412) and Jacob (James), Wonderworkers and Abbots of Luga and Omuch (Omutch), Pskov, disciples of Saint Arsenius of Konevets 29 December
- Saints Theophilus and James, monks of Konevits, founders of Dormition Monastery at Omutch (modern-day Feofilova Pustyn'),(ru) Pskov (c. 1412) 21 October
- St. Theophilus I of Alexandria, 23rd Pope of Alexandria and Patriarch of the See of St. Mark (d. 412) 15 October
- Venerable Theophilus of Luga and Omutch (1412), disciple of St. Arsenius of Konevits 8 June
- Saint Theophilus of the Kiev Caves, Archbishop of Novgorod (1482) 26 October
- New Martyr Theophilus of Zakynthos, burnt alive in Chios (1635) 24 July
- Venerable Theophilus the Confessor, under the iconoclasts (8th century) 2 October
- Hieromartyr Theophilus the Deacon, and Martyr Helladius, in Libya (4th century) 8 January
- Hieromartyr Theophilus the Deacon, and martyrs Dorotheus, Mardonius, Migdonius, Peter, Indes, Gorgonius, Zeno, Virgin Domna, and Euthymius (302) 3 September
- Venerable Theophilus the Myrrh-gusher of Pantocrator Monastery on Mount Athos (1548) 8 July
- Martyr Theophilus the New, in Cyprus (784) 30 January
- Venerable Theophilus the Silent, of the Kiev Caves (12th-13th century) 24 October
- Venerable Theophilus the Weeper and John (Ivan) of the Kiev Near Caves (11th–12th century) 29 December
- Saint Theophilus, Bishop of Antioch (181) 6 December
- Saint Theophilus, Bishop of Brescia (427) West, before the Schism 27 April
- Saint Theophilus, Bishop of Caesarea in Palestine (200) 5 March
- Martyrs Theophilus, Saturninus and Revocatus, in Spain (249-251) 6 February
- Martyrs Theophilus, Trophimus and another 13 martyrs with them (305) 21 July
- Blessed Theophylact, Archbishop of Ochrid (c. 1126) 31 December
- Saint Theophylact, Bishop of Stavropol and Ekaterinodar (1872) 11 May
- Saint Theophylactus, Bishop of Nicomedia (842) 8 March
- Martyr Theopistus (Theopistos), by stoning 2 January
- Venerable Theoprobus of Karpasia, Bishop of Karpasia in Cyprus (4th century) 4 January
- Blessed Theosebia the Deaconess, sister of Saints Macrina the Younger, Basil the Great, Peter of Sebaste, and Gregory of Nyssa (385) 10 January
- Venerable Theosebius the God-bearer, of Arsinoe in Cyprus 12 October
- Venerable Theosterictus the Confessor, Abbot of Pelekete Monastery near Prusa (826) 17 March
- Martyr Theotecnus of Antioch (3rd-4th century) 10 October
- Hieromartyr Theoteknos (Theotecnus), by the sword 10 December
- Martyr Theoteknos, by stoning 3 October
- Martyr Theotima of Nicomedia (311) 19 May
- Saints Theotimos and Theodoulos the Executioners, who believed in Christ through St. Hermione, died peacefully (c. 117) 4 September
- Saint Theotimus, Bishop of Tomis in Moesia (Lesser Scythia) (407) 20 April
- Venerable Therapon (Therapontus), Abbot of Monza Monastery (1597) 12 December
- Venerable Therapon, Ascetic and Wonderworker of Lythrodontas, Cyprus (c. 7th century) 30 October
- Martyrs Therapon, Macarius, Marcius and Marcia 27 June
- Venerable Therapont of Monza, Abbot of Monza (1597) 27 May
- Hieromartyr Therapont of Sardis, Bishop, by beheading (259) 27 May
- Venerable Therapont of White Lake, Abbot of Byelozersk (White Lake) and Mozhaisk (1426) 27 May
- Hieromartyr Therapontus, Bishop of Cyprus (632) 14 May, 25 May
- New Hieromartyr Therapontus, Priest, of Sofia, Bulgaria (1555) 27 May
- Saint Therissos (Thyrsos), Bishop of Karpasia in Cyprus 23 July
- Saint Therissos (Thyrsos), Bishop of Karpasia, Cyprus 5 August
- Martyr Thermos (Fermus, Firmus), by fire 5 April
- Martyr Thespesius of Cappadocia (222) 1 June
- Saint Thiento and Companions, Abbot of Wessobrunn in Bavaria in Germany, martyred with six of his monks by invading Hungarians (955) West, before the Schism 10 August
- Thirty Holy Martyrs of Rome (c. 303) West, before the Schism 22 December
- Thirty soldier-martyrs in Rome, under Diocletian (c. 304) West, before the Schism 1 January
- Martyr Thomais of Alexandria (476) 13 April, 14 April
- Saint Thomais of Lesbos (10th century) 3 January
- Venerable Thomas Dephourkinos the Righteous of Mount Kyminas in Bithynia (10th century) 10 December
- Saint Thomas I, Patriarch of Jerusalem (820) 16 May
- Saint Thomas II the New, Ecumenical Patriarch of Constantinople (668–669) 14 November, 15 November, 16 November
- Venerable Thomas of Mt. Maleon (Malevon), in Laconia (10th century) 7 July
- Saint Thomas, Abbot of the monastery of St. Euthymius (542) 24 March
- Venerable Thomas, Fool-for-Christ, of Syria (c. 550) 24 April
- Saint Thomas, Patriarch of Constantinople (610) 21 March
- Saint Thorgyth (Tortgith), nun at the convent of Barking in England with Saint Ethelburgh (c. 700) West, before the Schism 25 January
- Thousand Martyrs of Lichfield ('field of bodies') in England (c. 303) West, before the Schism 2 January
- Martyrs Thrason, Pontian and Praetextatus, in Rome under Diocletian, for ministering to Christian prisoners awaiting martyrdom (302) West, before the Schism 11 December
- Three children-martyrs and their mother, by the sword 2 June
- The holy Three Martyrs of Galatia, by the sword 28 June
- The Holy Three Martyrs of Melitene 31 October
- Three Martyrs of Rome, three soldiers who were converted at the martyrdom of the Apostle Paul in Rome, and then were themselves martyred (c. 68) West, before the Schism 2 July
- Three New Martyrs of Vrachori, Agrinio (1786) 29 September
- Holy Three Virgin-Martyrs of Chios, by the sword 9 June
- Saint Thurketyl (Turketil), the brother of King Edred of England, he became Abbot of Crowland and also of Bedford Abbey (975) West, before the Schism 11 July
- Martyrs Thyrsus and Agnes (5th century) 20 January
- Martyrs Thyrsus, Leucius, and Callinicus (Coronatus), with others, of Bithynia (c. 250) 14 December
- Martyrs Thyrsus, Leucius, and Callinicus (Coronatus), with others, of Caesarea in Bithynia (c. 250) 17 August
- Martyr Tibald of Pannonia (304) 28 April
- Saints Tiberius, Modestus and Florentia, martyrs under Diocletian at Agde in the south of France (303) West, before the Schism 10 November
- Saint Tiburtius, a martyr in Rome, connected with the soldier-martyr St Sebastian and was entombed at the Via Lavicana (c. 288) West, before the Schism 11 August
- Martyrs Tiburtius, Valerian and Maximus, in Rome (3rd century) West, before the Schism 14 April
- Saint Tigernach of Clones (Tigernake, Tierney, Tierry), Abbot of Clones, succeeded St Macartin as bishop at Clogher in Ireland (549) West, before the Schism 4 April
- Saints Tigides (4th century) and Remedius (419), two bishops who succeeded one another as Bishops of Gap in France West, before the Schism 3 February
- Saint Tigridia (Trigidia), Abbess of San Salvador de Oña, which her father Count Sancho Garcia founded for her to direct (c. 925) West, before the Schism 22 November
- Hieromartyr Tigrius, Priest, and Martyr Eutropius, Reader, of Constantinople (404) 16 June
- Venerable Saint Tikhon (Golenkov) of Kapsala, Mount Athos, the spiritual father of St. Paisios the Athonite (1968) 10 September
- New Hieromartyr Tikhon Buzov, Archimandrite, of Donskoy Monastery, Moscow (1937) 26 November
- New Hieromartyrs Tikhon Nikanorov, Archbishop of Voronezh, and with him 160 martyred priests (1919) 27 December
- Saint Tikhon of Amathus in Cyprus, Bishop and Wonderworker (425) 16 June
- Venerable Tikhon of Kaluga, or Medyn, founder of the St. Tikhon of Kaluga Monastery (1492) 16 June
- Saint Tikhon of Krestogorsk, founder of Krestogorsk Monastery, Vologda (17th century) 16 June
- Saint Tikhon of Lukhov, Kostroma (1503) 16 June
- Saint Tikhon of Zadonsk, Bishop of Voronezh, Wonderworker of Zadonsk (1783) 13 August
- Saint Tilbert (Gilbert), Bishop of Hexham in Northumbria in England (789) West, before the Schism 7 September
- Saint Tillo of Solignac (Thillo, Thielman, Théau, Tilloine, Tillmann) (702) West, before the Schism 7 January
- Martyr Timolaus and 7 Companions with him (8 Martyrs), in Caesarea Palaestina, by beheading (305) 24 March
- Apostle Timon the Deacon of the Seventy (1st century) 30 December
- Venerable Timon the Hermit (10th century) 25 March
- Venerable Timon, Monk of Nadeyev and Kostroma (1840) 21 January
- Martyrs Timothy and Diogenes, in Macedonia, by Arians (345) 6 April
- Saint Timothy of Caesarea, monk 27 February
- Martyr Timothy of Esphigmenou Monastery, Mt. Athos, at Adrianople (1820) 29 October
- Venerable Timothy of Euripos (Timothy of Chalcedon), Archbishop, founder of the Pendeli Monastery (1590) 16 August
- Saint Timothy of Proconnesus, Wonderworker, Archbishop of Proconnesus (6th century) 1 August
- Hieromartyr Timothy of Prussa, Bishop of Prusa (c. 361–363) 10 June
- Venerable Timothy of Symbola on Mt. Olympus in Bithynia (795) 21 February
- New Hieromartyr Timothy Petropavlovsk, Priest (1918) 30 June
- Saint Timothy the Confessor 1 February
- Saint Timothy the Hermit, of Egypt (4th century) 12 June
- Martyrs Timothy the Reader and his wife Moura (Maura), at Antinoöpolis, Egypt (304) 3 May
- Venerable Timothy the Stylite of Kakhshata (Kakhushta) (872) 4 January
- New Hieromartyr Timothy Ulyanov, Priest (1940) 10 June
- Saint Timothy, a martyr in Rome under Diocletian (c. 306) West, before the Schism 22 August
- Martyrs Timothy, Agapius, and Thecla, of Palestine (304) 19 August
- Saint Timothy, Archbishop of Alexandria (385) 13 February
- Martyrs Timothy, Faustinus and Venustus, in Rome, under Julian the Apostate (362) West, before the Schism 22 May
- Saint Timothy, Fool-for-Christ, of Svyatogorsk, near Pskov (1563) 17 July
- Apostle Timothy, of the Seventy Apostles (c. 96) 22 January
- Hieromartyrs Timothy, Polius and Eutychius, deacons, in Mauretania Caesariensis, Morocco West, before the Schism 21 May
- Saint Tiridates III (IV), King of Armenia (4th century) 29 November
- Martyr Tithoes 10 July
- Venerable Tithoes of the Thebaid (4th century), disciple of St. Pachomius the Great 26 August
- Saint Titian of Brescia, Germanic by birth, became Bishop of Brescia in Italy (ca. 536) West, before the Schism 3 March
- Saint Titian of Oderzo, for thirty years a Bishop near Venice in Italy (650) West, before the Schism 16 January
- Saint Titus of Bostra, Bishop of Bostra in Arabia (378) 22 February
- Apostle Titus of the Seventy Disciples, first Bishop of Crete (1st century) 25 August
- Saint Titus the Soldier, monk of the Kiev Caves (14th century) 27 February
- Venerable Titus the Soldier, monk of the Kiev Caves Monastery (11th century) 27 January
- Venerable Titus the Wonderworker (9th century) 2 April
- Saint Titus, a Deacon martyred during the sack of Rome by the Goths, while distributing alms to the half-starved population (c. 410) West, before the Schism 16 August
- Saint Titus, Bishop of Byzantium (3rd century) 4 June
- Hieromartyr Titus, Bishop of Tomis (323) 3 January
- Venerable Titus, hieromonk of the Kiev Caves Monastery (1196) 27 February
- Saint Tochumra, a holy virgin venerated in Kilmore in Ireland; she was called on by women in labour West, before the Schism 11 June
- Saint Tola of Clonard, Abbot and Bishop of Disert Tola in Meath in Ireland (c. 733) West, before the Schism 30 March
- Saint Tómméne (Thomian, Toimen), Archbishop of Armagh in Ireland (c. 660) West, before the Schism 10 January
- Martyr Torpes (Tropez), under Nero (65) West, before the Schism 29 April
- Saint Tozzo (Tazzo, Thosso), Bishop of Augsburg (661) West, before the Schism 16 January
- Saint Tranquillinus, a martyr in Rome connected with St Sebastian (c. 288) West, before the Schism 6 July
- Saint Trea, hermitess, converted to Orthodoxy by St Patrick, she spent the rest of her life as an anchoress in Ardtree, now in County Londonderry, Northern... (5th century) West, before the Schism 3 August
- Saint Tremorus of Brittany, infant son of St Triphina, he was the patron saint of Carhaix (6th century) West, before the Schism 7 November
- Saint Tressan (Trésain), a missionary from Ireland, he was ordained priest by St Remigius, and preached in Mareuil on the Marne in France (550) West, before the Schism 7 February
- New Martyr Triantaphyllos of Zagora, Thessaly, at Constantinople (1680) 8 August
- Saint Triduana (Tredwall, Trallen), nun of Restalrig, Scotland (4th century or 8th century) West, before the Schism 8 October
- Saint Trien (Trienan), a disciple of St Patrick and Abbot of Killelga in Ireland (5th century) West, before the Schism 22 March
- Saint Trillo of Llandrillo (Drillo, Drel), patron saint of two places in Gwynedd in Wales (6th century) West, before the Schism 15 June
- Saint Triphina, the mother of St Tremorus the infant-martyr, she spent the latter years of her life in a convent in Brittany (6th century) West, before the Schism 5 July
- Saint Triphyllius, Bishop of Ledra (Leucosia, Nicosia) in Cyprus (c. 370) 13 June
- Saint Triphyllius, Bishop of Leucosia (Nicosia), in Cyprus (370) 12 June
- Saint Trivelius Theoktist (Khan Tervel of Bulgaria), who played an important role in defeating the Arabs during the Siege of Constantinople in 717–718 (721) 3 September
- Saint Triverius (Trevor), hermit (550) West, before the Schism 16 January
- Martyr Troadius of Neo-Caesarea, and those with him (251) 2 March
- Saint Trojanus of Saintes (Troyen), a priest in Saintes in France where he later became bishop after St Vivien (533) West, before the Schism 30 November
- Martyrs Trophimus and Eucarpion, soldiers, at Nicomedia (300) 18 March
- Hieromartyrs Trophimus and Thalus, Priests of Laodicea (300) 16 March
- Hieromartyrs Trophimus and Thalus, Priests, of Laodicea (300) 11 March
- Saint Trophimus, first Bishop of Arles in France (c. 280) West, before the Schism 29 December
- Martyrs Trophimus, Sabbatius, and Dorymedon of Synnada (276-282) 19 September
- Martyrs Trophimus, Theophilus, and 13 others in Lycia (284-305) 23 July
- Venerable Trudo (Trudon, Tron, Trond, Truyen, Trudjen), Abbot, of Zirkingen (c. 695) West, before the Schism 23 November
- Saint Trudpert, a hermit, possibly from Ireland, who lived in Münstethal in Germany (c. 644) West, before the Schism 26 April
- Saint Trumwine of Abercorn (Trumwin of Whitby), the only ever Bishop of the Northumbrian see of the Picts (late 7th century) West, before the Schism 2 December
- Saint Trumwine of Abercorn, Bishop of the Southern Picts in Scotland, who retired at Whitby Abbey (c. 704) West, before the Schism 10 February
- Venerable Tryfaini and Matrona of Cyzicus 11 April
- Martyr Tryphaena of Cyzicus (1st century) 31 January
- Martyr Tryphon of Campsada near Apamea in Syria (250) 1 February
- Saint Tryphon of Constantinople, Patriarch of Constantinople (931) 19 April
- Saint Tryphon of Pechenga, Kola Peninsula, "Enlightener of the Lapps" (1583) 15 December
- Saint Tryphon of Vyatka, Archimandrite (1612) 8 October
- Saint Tryphon, Bishop of Rostov (1468) 1 February, 30 December
- Martyr Tryphon, by hanging 19 December
- New Hieromartyr Tryphon, Deacon (1938) 14 February
- Martyrs Tryphon, Trophimus, and Dorymedon, and 150 Martyrs, in Palestine 29 September
- Saint Tryphonia, a widow martyred in Rome (3rd century) West, before the Schism 18 October
- Great-martyr Tsar Lazar of Serbia (1389) 15 June
- Saint Tuda of Lindisfarne, Bishop of Lindisfarne (c. 664) West, before the Schism 21 October
- Saint Tudno, patron saint of Llandudno (6th century) West, before the Schism 5 June
- Saint Tudwal (Tugdual), monk from Wales who became Bishop of Tréguier, Brittany (c. 564) West, before the Schism 30 November
- Saint Tudwal, Bishop of Lan Pabu West, before the Schism 1 December
- Saint Tudy (Tudclyd, Tybie), a virgin in Wales; St Tybie's church in Llandybie in Dyfed is named after her (5th century) West, before the Schism 30 January
- Saint Tudy (Tudinus, Tegwin, Thetgo), a disciple of St Brioc in Brittany (5th century) West, before the Schism 11 May
- Martyr Tunom, Arab Emir who confessed Christ on seeing the Holy Fire in Jerusalem (1579) 18 April
- Saint Turiaf of Dol (Turiav, Turiavus), successor of St. Samson as Bishop of Dol in Brittany (c. 750) West, before the Schism 13 July
- Saint Turibius of Astorga, Bishop of Astorga in Spain and a valiant defender of Orthodoxy (c. 460) West, before the Schism 16 April
- Saint Turibius of Palencia, founder of the monastery of Liébana in Asturias in Spain (c. 528) West, before the Schism 16 April
- Saint Turninus, a priest from Ireland who worked with St Foillan in Holland, and also near Antwerp in Belgium (8th century) Almost certainly the same as... West, before the Schism 17 July
- Saint Tutilo (Tuotilo), a gifted and artistic monk at St Gall Abbey in Switzerland (ca. 915) West, before the Schism 28 March
- Saint Tuto (Totto), founder in 764 of the monastery of Ottobeuren in Bavaria in Germany (815) West, before the Schism 19 November
- Saint Tuto (Totto), monk and Abbot of St Emmeram in Regensburg in Germany, where he later became bishop (930) West, before the Schism 14 May
- The Holy Twelve Daughters 31 October
- Twelve Soldier-Martyrs of Rome, by the sword West, before the Schism 31 July
- Twenty Martyrs (Fidentian, Valerian, Victoria, etc.) in North Africa West, before the Schism 15 November
- Twenty-three (23) Martyrs of Rome, on the Salarian Way in Rome, under Diocletian (303) West, before the Schism 5 August
- The Venerable Two Ascetic Hermits, reposed in peace in the desert 20 June
- The Two Brothers Arwald, sons of Arwald, the last Jutish King of the Isle of Wight, put to death by soldiers of King Ceadwalla, then a pagan, on the day... (686) West, before the Schism 22 April
- Holy Two Children-Martyrs, by fire 13 October
- The holy Two Children, who were crucified 28 June
- Two Confessor Bishops, who were exiled to the Crimean peninsula together with St. Martin the Confessor, Pope of Rome (ca. 655) 13 April
- The Two Martyrs of Cyprus 18 June
- The Holy Two Martyrs of Parium, near Cyzicus and Lampsacus, in Asia Minor 23 January
- Two martyrs of Thrace, crushed between two large rocks 25 October
- The two martyrs of Tyre, dragged to death 8 August
- Holy Two Martyrs, father and son, by crucifixion 13 February
- The Holy Two Martyrs, mother and daughter, by the sword 28 January
- The Holy Two Martys of Phrygia 26 January
- Holy Two Virgin-Martyrs, by the sword 15 September
- Holy Apostle Tychicus (1st century) 7 December
- Saint Tydecho of Wales, brother of Saint Cadfan (6th century) West, before the Schism 17 December
- Saint Tydfil, venerated in Merthyr Tydfil in Wales, where she was slain by the heathen () West, before the Schism 23 August
- Saints Tygrius the Presbyter, and Eutropius the Lector, at Constantinople (c. 395 - 408) 12 January
- Saint Tysilio (Tyssel, Tyssilo, Suliau), Prince of Powys, Abbot of Meifod, Wales (7th century) West, before the Schism 8 November