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- Prophet Habakkuk (Abbacum) (7th century BC) 2 December
- Saint Habet-Deus, Bishop of Luna in Tuscany in Italy, probably martyred by the Arian Vandals (c. 500) West, before the Schism 17 February
- Saint Hadelin of Dinant, founder of the monastery of Chelles, in Belgium (690) West, before the Schism 3 February
- New Martyr Hadji Theodore of Mytilene (Mt. Athos) (1784) 30 January
- New Martyr Hadji-George of Philadelphia in Asia Minor, from Mount Athos (1794) 2 October
- Venerable Hadji-Georgis the Athonite (1886) 30 December
- Saint Haduin (Harduin), Bishop of Le Mans in France, he founded several monasteries including Notre-Dame-d'Evron (c. 662) West, before the Schism 20 August
- Saint Hædde (Hedda), Bishop of the West Saxons (705) West, before the Schism 7 July
- Prophet Haggai (Aggaeus) (500 BC) 16 December
- Saint Haido of Stanos (1820-1821) 1 September
- Saint Hallvard Vebjørnsson of Husaby, Norway (1043) West, before the Schism 15 May
- Saint Hallvard, of the royal family of Norway, patron saint of Oslo, martyr (1043) West, before the Schism 14 May
- Prophet Hanani (Ananias) - (II Chronicles 16:7-10) 27 March
- Righteous Hannah (Anna), mother of the Prophet Samuel (1100 BC) 23 July
- Saint Haralambos of Panagia Kalyviani convent (in the Heraklio Prefecture), the newly-revealed (1788) 23 August
- Saint Hardoin, Bishop of Saint-Pol-de-Léon in Brittany (7th century) West, before the Schism 29 November
- Saint Harduin, a monk at Fontenelle Abbey in France (749), then a hermit who copied writings of the Fathers (811) West, before the Schism 20 April
- Saint Hardulf, a hermit at Breedon in Leicestershire in England where the church is dedicated to him (7th century) West, before the Schism 6 August
- Saint Hartwig, twenty-first Archbishop of Salzburg in Austria (1023) West, before the Schism 14 June
- Saint Haruch, Bishop near Werden in Germany (c. 830) West, before the Schism 15 July
- Saint Hatto, born of a noble Swabian family, he left all his property to the monastery of Ottobeuren in Germany, and became a monk there (985) West, before the Schism 4 July
- Holy Great-martyr and Healer Panteleimon (305) 27 July
- Saint Hebarestes, steward of a church located in Jerusalem 15 March
- Saint Hedda and Companions, Abbot of Peterborough in England, martyred by the Danes (869) West, before the Schism 9 April
- Saint Hedwig (Haduwy), Abbess of Herford Abbey in Westphalia in Germany (c. 887) West, before the Schism 13 September
- Saint Hegesippus the Chronicler, of Palestine (c. 180) 7 April
- Saint Heimerad (Heimrad), a priest at Baden in Germany who after many pilgrimages lived as a monk at Hersfeld Abbey and then as a hermit at Hasungen in... (1019) West, before the Schism 28 June
- Saint Helanus, priest, in the diocese of Rheims in France (6th century) West, before the Schism 7 October
- Saint Heldrad (Eldrad, Eldradus), abbot at Novalesa Abbey for thirty years (842) West, before the Schism 13 March
- Saint Helen (Heliada), Abbess of the convent of Oehren in Trier in Germany (c. 750) West, before the Schism 20 June
- Saint Helen Devochkina, Abbess of Novodevichy Convent, Moscow (1547) 18 November
- Saint Helen of Auxerre (c. 418) West, before the Schism 22 May
- Saint Helen of Caernarfon (Elen Luyddog, lit. "Helen of the Hosts"), daughter of a Romano-British ruler, wife of Emperor Magnus Maximus, and a founder of... West, before the Schism 22 May
- Saint Helen of Dečani, Serbia, Princess (c. 1350) 21 May
- Venerable Helena Dragaš (Ypomone in monasticism; Ipomoni of Loutraki) (1450) 29 May
- Martyr Helier of Jersey (6th century) West, before the Schism 16 July
- Martyrs Heliodorus and Dosa (Dausa) in Persia (380) 20 August
- Martyrs Heliodorus and Venustus and seventy-five others in Africa (284–305) West, before the Schism 6 May
- Martyr Heliodorus in Pamphylia (273) 19 November
- Saint Heliodorus of Altino, first bishop of Altinum (Altino) (c. 390) West, before the Schism 3 July
- Saint Heliodorus, Schema-Archimandrite of Glinsk Hermitage (1879) 28 June
- Saint Helladios the Commentarisius (prison warden) 24 January
- Hieromartyr Helladios, Bishop (6th-7th centuries) 27 May
- Saints Helladius and Onesimus of the Near Caves in Kiev (12th-13th centuries) 4 October
- Saint Helladius of Auxerre (387) West, before the Schism 8 May
- Hieromartyr Helladius of the East, bishop (4th century) 28 May
- Saint Helladius of Toledo, Archbishop of Toledo and Confessor (632) West, before the Schism 18 February
- Venerable Helladius, monk 9 November
- Martyrs Hemeterius and Cheledonius, believed to have been soldiers, suffered in Calahorra in Old Castile (ca. 298) West, before the Schism 3 March
- Saint Hemma of Gurk (Gemma, Emma), a widow, she founded the monastery of Gurk in Carinthia in Austria and became a nun there (1045) West, before the Schism 29 June
- Saint Henry (Heric), born in Hery in Yonne in France, he became a monk at the Abbey of Saint-Germain d'Auxerre (c. 880) West, before the Schism 24 June
- Hieromartyrs Heraclides and Myron, Bishops of Tamassos in Cyprus (1st century) 17 September
- Martyrs Heraclius and Zosimus, who suffered in Carthage in North Africa under Valerian and Gallienus (263) West, before the Schism 11 March
- Saint Heraclius of Sens, the fourteenth Bishop of Sens in France (c. 515) West, before the Schism 8 June
- Martyr Heraclius, clubbed to death 14 July
- Saint Heraclius, Patriarch of Alexandria, first called by the term "Pope" (246) 14 July
- Martyrs Heraclius, Paulinus, and Benedimus of Athens (250) 18 May
- Martyrs Heradius, Paul, and Aquilinus, near Lake Geneva (284-305) West, before the Schism 17 May
- Saint Herbert (Haberne, Herbern), Abbot of Marmoutier and later Archbishop of Tours in France (916) West, before the Schism 30 October
- Saint Herbert of Derwentwater, an Anglo-Saxon priest and friend of St Cuthbert, who lived as a hermit on St Herbert's Island (687) West, before the Schism 20 March
- Saint Herculanus of Brescia, Bishop of Brescia in Italy (c. 550) West, before the Schism 12 August
- Saint Herculanus of Perugia, Bishop of Perugia in Italy, beheaded by soldiers of Totila of the Ostrogoths (549) West, before the Schism 1 March
- Saint Herculanus of Perugia, Martyr-Bishop of Perugia in Italy, beheaded by soldiers of Totila of the Ostrogoths (549) West, before the Schism 7 November
- Saint Herculanus, a martyr in Porto near Rome, probably under Marcus Aurelius (c. 180) West, before the Schism 5 September
- Saint Herculanus, a soldier martyred in Rome West, before the Schism 25 September
- Saint Herebald (Herband), born in Britain, he lived as a hermit in Brittany where a church is dedicated to him (8th century) West, before the Schism 11 June
- Saint Herefrith of Louth, Bishop of Lincolnshire (c. 873) West, before the Schism 27 February
- Saint Hereswith, a princess from Northumbria in England, and sister of St Hilda, she ended her life as a nun at Chelles Abbey in France (c. 690) West, before the Schism 3 September
- Saint Heribaldus, Monk and abbot of the monastery of St Germanus in Auxerre in France and later bishop of the same city (c. 857) West, before the Schism 25 April
- Saint Heribert of Cologne, Archbishop of Cologne (1021) West, before the Schism 16 March
- Saints Herlindis and Relindis, Daughters of Count Adelard, who became respectively the first and second abbesses of Maaseik Abbey (c. 745 and 750) West, before the Schism 12 October
- Saint Hermagoras of Aquileia, and his deacon Fortunatus, martyrs under Nero (c.66) West, before the Schism 12 July
- New Hieromartyr Herman (Kokel), Bishop of Alatyr (1937) 20 October
- New Hieromartyr Herman (Kosolapov), Bishop of Volsk (1919) 27 September
- New Hieromartyr Herman (Ryashentsev), Bishop of Vyaznikov (1937) 2 September
- Saint Herman Gomzin, Schema-abbot of Zosima Hermitage (1923) 17 January
- Saint Herman, Archbishop of Kazan (1567) 6 November
- Venerable Herman, Archimandrite, of Svyatogorsk Monastery (1890) 13 April
- Saint Herman, founder of Stolobny Monastery, Novgorod (1614) 22 February
- Venerable Herman, Wonderworker of Alaska (1836) 13 December
- Apostle Hermas of the Seventy, Bishop in Philipopoulis (1st century) 8 March
- Apostles Hermas, Patrobas, Linus, Gaius and Philologus, of the Seventy (1st century) 4 November
- Saint Hermenegild, a monk at Salcedo in Galicia in Spain (586) West, before the Schism 5 November
- Saint Hermenegild, son of the Visigothic King of Spain, Leovigild (586) West, before the Schism 13 April
- Saint Hermengaudius (Ermengol, Armengol), Bishop of Urgell in Spain (1035) West, before the Schism 3 November
- Martyr Hermeningild the Goth, Prince of Spain (586) West, before the Schism 1 November
- Saint Hermenland (Hermeland, Herbland, Erblon), monk at Fontenelle, ordained priest and sent with twelve monks to establish a new monastery on the island of... (c. 720) West, before the Schism 25 March
- Saint Hermes and Companions, martyrs in Rome under the judge Aurelian (c. 120) West, before the Schism 28 August
- Saints Hermes and Theodora the martyrs (132) 1 April
- Saint Hermes of Dunonia, exorcist (4th century) 31 December
- Apostle Hermes of Philippopolis (Hermas), of the Seventy Apostles (1st century) 31 May
- Martyrs Hermes, Adrian and Companions, in Numidia in North Africa under Maximian Herculeus (c. 290) West, before the Schism 1 March
- Martyrs Hermes, Serapion, Polyaenus of Rome (2nd century) 18 August
- Martyr Hermias of Comana (160) 31 May
- Martyr Hermione of Ephesus, daughter of Apostle Philip the Deacon (c. 117) 4 September
- New Hieromartyr Hermogenes (Dolganyov), Bishop of Tobolsk, and those with him (1918) 16 June
- Martyrs Hermogenes and Menas (Mamas, Mamatos) 24 January
- Saints Hermogenes and Philemon, Bishop of Karpathos 24 January
- Saint Hermogenes of Moscow, Patriarch and Wonderworker of Moscow and all Russia (1612) 17 February
- Hieromartyr Hermogenes the Wonderworker, Bishop of Samos, whose relics are in Cyprus 5 October
- Saint Hermogenes, Bishop of Agrigentum (c. 260) or (c. 824) 24 November
- Martyr Hermogenes, by having his teeth pulled out, dying of infection and bleeding 24 July
- Martyrs Hermogenes, Caius, Expeditus, Aristonicus, Rufus and Galatas, at Melitine, in Armenia 19 April
- Saint Hermogius, founder of Labrugia Monastery in Spanish Galicia (c. 942) West, before the Schism 26 June
- Hieromartyrs Hermolaus, Hermippus and Hermocrates at Nicomedia (c. 305) 26 July
- Martyrs Hermylus (Hermilos) the Deacon and Stratonicus (Stratonikos), at Belgrade (315) 13 January
- Saint Hernin (Hernan), a hermit in Brittany at a place called Loc-Harn after him (6th century) West, before the Schism 15 September
- Apostle Herodion of Patras of the Seventy Apostles (1st century) 28 March
- Venerable Herodion, founder of Iloezersk Monastery, Belozersk (1541) 28 September
- Saint Heron the Philosopher 10 August
- Saint Herulph, a monk at St Gall in Switzerland, then founded the monastery of Ellwangen (764) near Augsberg in Germany, later became Bishop of Langres in... (785) West, before the Schism 13 August
- Venerable Herveus of Plouvien (Hervé), blind from childhood, he became Abbot of Plouvien, from where he moved with some of his monks to Lanhouarneau (c. 575) West, before the Schism 17 June
- Saint Herveus of Tours (Hervé), monk at the monastery of St Martin of Tours, and hermit (1021) West, before the Schism 16 April
- Martyrs Hesperos (Exuperius) and Zoe, and their sons Cyriacos and Theodoulos, at Attalia (c. 124) 2 May
- Venerable Hesychios the Sinaite, Abbot of Saint Catherine's Monastery at Mount Sinai (7th century) 29 March
- Venerable Hesychios the Sinaite, hegumen of Saint Catherine's Monastery (7th century) 23 June
- Venerable Hesychios the Theologian of Jerusalem (434), disciple of St. Gregory the Theologian 28 March
- Saint Hesychius the Faster, of Bithynia (790) 5 March
- Martyr Hesychius the Palatine of Antioch (c. 304) 10 May
- Martyr Hesychius the Senator (the Palatine), of Antioch (ca. 304) 2 March
- Blessed Hesychius the Silent, of Mt. Horeb (6th century) 3 October
- Martyr Hesychius the Soldier, of Dorostolum, and two others, in Moesia (297) 15 June
- Venerable Hesychius the Wonderworker 6 March
- Martyr Hesychius, by hanging 2 September
- Hieromartyrs Hewald the White (Ewald the Fair) and Hewald the Black (Ewald the Dark), at Cologne (c. 695) West, before the Schism 3 October
- Righteous Hezekiah, King of Judah (696 B.C.) 28 August
- Saint Hidulf (Hidulphus), founder of Moyenmoutier Abbey, and reputed Bishop of Trier (707) West, before the Schism 11 July
- Saint Hidulf, Count of Hainault in Belgium, he became a monk at Lobbes Abbey which he had helped to found, Benedictine abbot (c. 707) West, before the Schism 23 June
- Saint Hierax (Ierakos) of Egypt (5th century) 8 May
- Saint Hierax of Egypt (5th century) 5 May
- Saint Hieria, widow, of Mesopotamia (312) 3 June
- Venerable Hiero-schema-monk Lazarus the Clarivoyant, of Pskov-Caves Monastery (1824) 27 May
- Hieromarytr Philemon the Bishop, and martyr Fortunatus 27 September
- Venerable Confessor Hieromonk Arsenie (Boca) of Prislop (1989) 28 November
- Hieromonk Bartholomeus (Ratnykh) (1937) 19 November
- Venerable Hieromonk Matthew of Yaransk the Wonderworker ( 'Mitrophan Kuzmich Zvetsov' ) (1927) 16 May
- New Hieromartyrs Hierotheus (Afonin), Bishop of Nikolsk (1928), and Hieroschemamonk Seraphim (Nikolsky) (1923) 31 May
- Hierotheus (Glazkov), Hieromonk, of Lyubim (Yaroslasvl) (1937) 22 August
- Hieromartyr Hierotheus of Athens, first Bishop of Athens (1st century) 4 October
- Saint Hierotheus of Hungary (10th century) 7 August
- Venerable Hierotheus of Kalamata (Hierotheos the New), monk of Iveron Monastery, Mt. Athos (1745) 13 September
- Saint Hierotheus, first Bishop and Enlightener of Hungary (10th century) 20 August
- Hierymartyrs Nicander, Bishop of Myra, and Hermas, presbyter, both disciples of Titus (1st century) 4 November
- Saint Hieu, Abbess of Tadcaster, England (c. 657) West, before the Schism 2 September
- Martyrs Hilaria, Digna, Euprepia, Eunomia, Quiriacus, Largio, Crescentian, Nimmia, Juliana and Companions (c. 304) West, before the Schism 12 August
- New Hieromartyr Hilarion (Gromov), Hieromonk, of Petushki, Vladimir (1937) 28 September
- New Hieromartyr Hilarion (Pisarets), hieromonk of Glinsk Hermitage (1937) 20 November
- Saint Hilarion Grigorovich, Bishop of Krutitsa (1759) 3 December
- Saint Hilarion of Kiev, the first non-Greek Metropolitan of Kiev (c. 1055) 21 October
- Venerable Hilarion of Tvali, Georgia (1041) 24 July
- New Hieromartyrs Hilarion Soloviev and Simeon Afonkin, Priests, of Alma Ata (1937) 25 November
- New Monk-martyr Hilarion the Cretan, of St. Anne’s Skete, Mt. Athos, at Constantinople (1804) 20 September
- Saint Hilarion the Georgian (the New) of Imereti and Mt. Athos (1864) 14 February
- Venerable Hilarion the Great, of Gaza (371) 21 October
- Saint Hilarion the Iberian (882) 13 November
- Venerable Hilarion the Iberian of Georgia, monk, Wonderworker of Thessalonica (875) 19 November
- Venerable Hilarion the New, Abbot of Pelekete Monastery near Prusa (754) 28 March
- Venerable Hilarion the New, Abbot of the Dalmatian Monastery at Constantinople (845) 6 June
- Venerable Hilarion the Schemamonk of the Kiev Caves (11th century) 21 October
- New Hieromartyr Hilarion Troitsky, Archbishop of Vereya (Verey) (1929) 15 December
- Venerable Hilarion, Elder, of Optina Monastery (1873) 18 September
- Saint Hilarion, founder of Pskovoezersk Monastery, Gdov (1476) 21 October
- Saint Hilarion, Metropolitan of Suzdal and Yuriev (1707) 14 December
- Venerable Hilarion, monk, of Gdov, Pskov (1476) 28 March
- Saint Hilarion, Recluse, of Troekurovo (1853) 5 November
- Saint Hilary (Hilaire), Bishop of Carcassonne in France (5th century) West, before the Schism 3 June
- Saint Hilary (Hilarion), Archbishop of Arles (449) West, before the Schism 5 May
- Saint Hilary (Hilarius, Hilaire), Bishop of Toulouse in France (360) West, before the Schism 20 May
- Saint Hilary (Hilarus), Pope of Rome (468) West, before the Schism 28 February
- Martyrs Hilary of Aquileia and Tatian the Deacon, with Felix, Largus and Denis, under Numerian (c. 284) West, before the Schism 16 March
- Saint Hilary of Galeata (Hilary of Tuscany), founder of the monastery called Galeata, later known as Sant'Ilaro (Sant'Ellero di Galeata) (558) West, before the Schism 15 May
- Saint Hilary of Mende (Hilarius), Bishop of Mende (535) West, before the Schism 25 October
- Saint Hilary of the desert, the Wonderworker 4 May
- Saint Hilary, Benedictine Abbot of San Vincenzo in Volturno (1011–1045), who revived the monastic life there (c. 1045) West, before the Schism 21 November
- Saint Hilary, Bishop of Pavia, one of the bishops in the north of Italy who fought against Arianism (376) West, before the Schism 16 May
- Saint Hilary, Bishop of Poitiers (Pictavium) (368) West, before the Schism 13 January
- Venerable Hilda, Abbess of Whitby Abbey (680) West, before the Schism 17 November
- Saint Hildebert of Ghent, Abbot of Saint Peter's Abbey, Ghent, Belgium, martyred by fanatics for defending the veneration of icons (752) West, before the Schism 4 April
- Saint Hildebold, first Archbishop of Cologne (818) West, before the Schism 3 September
- Saint Hildegrim of Châlons, Bishop of Châlons-sur-Marne in France and then Abbot of Werden in Germany (827) West, before the Schism 19 June
- Saint Hildelith, Abbess of Barking Abbey (c. 712) West, before the Schism 24 March
- Saint Hildemar (Hildemanus), a monk at Corbie who became Bishop of Beauvais in France in 821 (844) West, before the Schism 10 December
- Saint Hildemarca, a nun at the convent of St Eulalia in Bordeaux, who became Abbess of Fécamp Abbey in the north of France (c. 670) West, before the Schism 25 October
- Saint Hilduard (Hilward, Garibald), founder of the monastery of St Peter in Dickelvenne on the Schelde in Belgium (c. 750) West, before the Schism 7 September
- Saint Hiltrude, a hermit near the monastery of Liessies in France (c. 790) West, before the Schism 27 September
- Saint Himelin, an Irish or Scottish priest who, returning from a pilgrimage to Rome, fell ill when passing through Vissenaken (c. 750) West, before the Schism 10 March
- Saint Himerius (Imier), a hermit in the Jura in Switzerland, now called after him Immertal, Val-Saint-Imier (c. 610) West, before the Schism 12 November
- Saint Himerius of Cremona, Bishop of Ameila in Umbria (c. 560) West, before the Schism 17 June
- Saint Hincmar, Archbishop of Reims (882) West, before the Schism 21 December
- Saint Hippolyte of Belley, Bishop of Belley, then hermit in Saint-Claude in Franche-Comté (769) West, before the Schism 20 November
- Saint Hippolytus of Porto, Bishop of Porto in Italy, martyred by drowning under Alexander (236) West, before the Schism 22 August
- Martyr Hippolytus of Rome, and 18 martyrs with him (258) 13 August
- Hieromartyr Hippolytus of Rome, Bishop of Rome, and those with him 30 January
- Saint Hippolytus, Bishop of Saint-Claude in France (c. 775) West, before the Schism 28 November
- Hieromartyr Hippolytus, priest, of Antioch, martyred in the period of the heretical Novatianists 30 January
- The Holy, Glorious and All-Praised Leaders of the Apostles, Peter and Paul (67) 29 June
- Saint Honestus (Honestus of Nîmes), a disciple of Saturninus of Toulouse, who preached the Gospel in Spain (270) West, before the Schism 16 February
- Saint Honorata of Pavia, Nun, sister of Saint Epiphanius of Pavia, who ransomed her after she was abducted from the monastery of Saint Vincent in Pavia (c. 500) West, before the Schism 11 January
- Saint Honoratus of Amiens, the seventh Bishop of Amiens (c. 600) West, before the Schism 16 May
- Saint Honoratus of Fondi, founder of the monastery of Fondi in Italy (6th century) West, before the Schism 16 January
- Saint Honoratus of Milan, Bishop of Milan and Confessor (570) West, before the Schism 8 February
- Saint Honoratus of Toulouse, born in Spain, he succeeded Saint Saturninus as Bishop of Toulouse in France (3rd century) West, before the Schism 21 December
- Saint Honoratus of Vercelli, Bishop of Vercelli (c. 415) West, before the Schism 28 October
- Venerable Honoratus, Archbishop of Arles and Founder of Lerins Monastery (429) West, before the Schism 16 January
- Saint Honorina (Honorine), an early martyr in the north of France West, before the Schism 27 February
- Saint Honorius of Brescia, a hermit near Brescia in Italy who was chosen bishop of that city (c. 586) West, before the Schism 24 April
- Saint Honorius, Archbishop of Canterbury, Confessor (653) West, before the Schism 30 September
- Martyrs Honorius, Eutychius and Stephen, in Asta in Andalusia in Spain under Diocletian (c. 300) West, before the Schism 21 November
- Saint Hormisdas, Pope of Rome and Confessor, author of the Formula of Hormisdas (523) West, before the Schism 6 August
- Prophet Hosea (Osee) (820 BC) 17 October
- Prophets Hosea and Haggai (6th-4th century BCE) West, before the Schism 4 July
- Hosios Stephanos the Chorabyte 18 May
- Saint Hosius the Confessor (Osius or Ossius), Bishop of Cordova (359) 27 August
- Saint Hospitius the Hermit of Nice, Wonderworker (581) West, before the Schism 21 May
- The Holy Host of Paupers (300 martyrs), brought together by Saints Florus and Laurus, who smashed the statues of the pagan gods and were martyred by fire 18 August
- Saint Hubert (Hugbert of Bretigny, Hubert of Maastricht), the "Apostle of the Ardennes", first Bishop of Liège (727) West, before the Schism 30 May
- Saint Hubert, Bishop of Liege (727) West, before the Schism 3 November
- Saint Hugh of Ambronay, third Abbot of Ambronay Abbey near Belley in France (9th–10th centuries) West, before the Schism 21 October
- Saint Hugh of Anzy-le-Duc, a monk at Saint Savin (c. 930) West, before the Schism 20 April
- Saint Hugh of Rouen (Hugh of Champagne), Bishop of Rouen and then of Paris, and was also Abbot of Fontenelle and Jumièges (730) West, before the Schism 9 April
- Prophetess Huldah (Olda) (IV Kings 22:14) 10 April
- Saint Humbert of Maroilles, a disciple of St Amandus who helped found the monastery of Marolles in Belgium (c. 680) West, before the Schism 25 March
- Saint Humbert, a monk at Fritzlar and Büraburg in Germany (7th or 8th century) West, before the Schism 26 October
- Saint Humphrey (Hunfrid of Prüm), Bishop of Therouanne in France and was Abbot of St Bertin (871) West, before the Schism 8 March
- Saint Huna of Thorney, priest-monk of Huneia (c. 690) West, before the Schism 13 February
- Saint Hunegund (c. 690) West, before the Schism 25 August
- Saint Hunger (Hungerus Frisus), Bishop of Utrecht in the Netherlands from 856; during the Norman invasion he fled to Prüm in Germany where he died (866) West, before the Schism 22 December
- Saint Hunna, the self-sacrificing wife of a nobleman in Alsace, now in France (679) West, before the Schism 15 April
- Martyr Hyacinth of Amastris (4th century) 18 July
- Saint Hyacinth of Vicina, Metropolitan of Wallachia (1372) 28 October
- Martyr Hyacinth the Cubicularius, of Caesarea in Cappadocia (108) 3 July
- Martyrs Hyacinth, Alexander and Tiburtius, martyrs in the Sabine country in Italy, about thirty miles from Rome West, before the Schism 9 September
- Martyrs Hyacinth, Quintus, Felician and Lucius, at Lucania in the south of Italy West, before the Schism 29 October
- Saint Hydrock (Hydroc) of Cornwall (5th century) West, before the Schism 5 May
- Saint Hygbald (Hybald, Hibald), abbot in Lincolnshire in England to whom several churches are dedicated, notably at Hibaldstow (c. 690) West, before the Schism 14 December
- Hieromartyr Hyginus, Pope of Rome (142) West, before the Schism 11 January
- Hieromartyr Hypatius of Gangra, Bishop of Gangra, Wonderworker (326) 16 November
- Saint Hypatius the Healer, of the Kiev Caves (14th century) 31 March
- Saint Hypatius the Wonderworker, Bishop of Gangra (326) 31 March
- Saint Hypatius, Abbot of Rufinus in Chalcedon (446) 31 March
- Venerable Hypatius, Abbot, of the monastery of the Rufinianes, Confessor (446) 17 June
- Martyr Hypatius, and 36 martyrs with him, from the Thebaid in Egypt 14 December
- Hieromartyrs Hypatius, Bishop of Ephesus and Andrew the Presbyter, Confessors of the Holy Icons, under Leo III the Isaurian (8th century) 20 September
- Hieromartyr Hypatius, Bishop of Ephesus, and his Presbyter Andrew (730) 21 September
- Venerable Hyperechius of the "Paradise", Egypt (4th century) 7 August
- Saint Hywyn, probably a companion of Saint Cadfan on his return journey from Brittany to Cornwall and Wales; by tradition he founded Aberdaron in Gwynedd (516) West, before the Schism 6 January