Saints: O

Prophet Obadiah (Abdia, Abdias) (9th century BC) 19 November
Saint Obdulia, a holy virgin venerated in Toledo in Spain West, before the Schism 5 September
Martyr Oceanus 12 September
Saint Octavian and Companions, Archdeacon of the Church in Carthage in North Africa, martyred with several thousand companions under the Arian Vandal King... (484) West, before the Schism 22 March
Martyrs Octavius, Solutor and Adventor, patron-saints of Turin in Italy where they were martyred (297) West, before the Schism 20 November
Saint Oda (Odo) the Good, Archbishop of Canterbury (958) West, before the Schism 2 June
Saint Oda of Amay, Belgium (Ode)], foundress of churches (723) West, before the Schism 23 October
Saint Oda of Brabant, the Blind Princess of Scotland (c. 726) West, before the Schism 28 November
Saint Odilia (Otilia, Othilia) of Alsace, Gaul (c. 720) West, before the Schism 13 December
Saint Odilo of Cluny (1049) West, before the Schism 11 May
Saint Odilo, a monk at Gorze Abbey in Lorraine in France, who became Abbot of Stavelot-Malmédy in Belgium (c. 954) West, before the Schism 15 October
Saint Odo of Beauvais, Bishop of Beauvais (880) West, before the Schism 28 January
Saint Odo of Cluny (942) West, before the Schism 18 November
Saint Odo of Cluny, the second Abbot of Cluny (942) West, before the Schism 11 May
Saint Odo of Massay, Abbot of Massay in France (935-967) West, before the Schism 7 June
Saint Odrada, Virgin, of Balen, Netherlands (8th century) West, before the Schism 5 November
Saint Odran, ranks as the first Christian martyr in Irish history () West, before the Schism 19 February
Saint Odulphus (Odulph), Confessor and Priest (c. 855) West, before the Schism 12 June
Saint Oduvald, a noble who became a monk and later Abbot of Melrose Abbey in Scotland (698) West, before the Schism 26 May
Saint Oecumenius (Ecumenius, Ekoumenios) the Wonderworker, Bishop of Trikala (Tricca) (10th century) 3 May
Saint Óengus the Culdee (Óengus of Tallaght, Angus), Bishop, of Clonenagh, Ireland (824) West, before the Schism 11 March
Martyrs of Adrianople (815 or 817) 22 January
Martyrs of Aeithalas and Ammon of Adrianople, Thrace, by severe whipping 2 September
New Martyr of Alaska, Peter (Cungagnaq) the Aleut, at the hands of Roman Catholics in San Francisco (1815) 24 September
Martyrs of Catania, in Sicily West, before the Schism 31 December
The Holy Hieromartyrs of Cherson 7 March
New Hieromartyrs and martyrs of Crete (1821) 23 June
New Hieromartyrs of David Gareja Monastery, slain by the Dagestanis (Lekians) (1851) 12 August
Martyrs of Ebsdorf, martyred at the Battle of Luneberg Heath near Ebsdorf, Saxony (880) West, before the Schism 2 February
Virgin Martyrs of Emesa, Syria (779) 14 November
New Martyrs of Estonia (1944-1955) 20 August
New Martyrs of Garavice and Bihac-Petrovac 27 July
Venerable monk-martyrs of Iveron Monastery, martyred by the Latins (c. 1259-1280) 13 May
Venerable New Martyrs of Karyes Skete on Mount Athos: Kosmas (Cosmas) the Protos of Vatopedi and Companions, killed by the Latins (1280) 5 December
The Holy Martyrs of Kvabtakhevi Monastery, Georgia, who suffered during the invasion of Tamerlane (1386) 10 April
Holy Martyrs of Lazeti, Georgia (17th–18th centuries) 29 April
The Holy Martyrs of Lyon (c. 177) 25 July
Holy Martyrs of Mamilla, Jerusalem (614) 20 May
New Martyrs and Confessors of Năsăud, Romania (1763) 12 November
Holy Martyrs of Niculitsel, Romania (320) 4 June
Martyrs of North-West Africa West, before the Schism 30 October
Martyrs of North-West Africa, a group of Christians martyred in Masyla West, before the Schism 9 April
Holy Martyrs of North-West Africa, a large group martyred at the Easter liturgy by Genseric, the Arian King of the Vandals (459) West, before the Schism 5 April
Martyrs of North-West Africa, burnt at the stake under Septimius Severus (c. 210) West, before the Schism 6 January
Martyrs of North-West Africa, the 'Guardians of the Holy Scriptures' (303) West, before the Schism 11 February
New Martyrs of Novo Selo ("Holy Trinity" Novoselska convent), Bulgaria (1876) 26 April
Martyrs of Pannonia, seven virgin-martyrs in Sirmium in Pannonia West, before the Schism 9 April
New Martyrs of Paris 20 July
New Martyrs of Perm (1918) 4 December
Martyrs of Persia under Shapur II (343) 20 November
Holy New Martyrs of Prebilovci in Hercegovina (1941) 24 July
Saints of Pskov martyred by the Latins 4 March
New Martyrs of Reskovac , Republika Srpska, who suffered at the hands of the Turks (1688) 4 May
New Martyrs of Rmanj 10 September
Martyrs of Rome (c. 115) West, before the Schism 10 April
Martyrs of Rome, a group of nine hundred martyrs buried in the Catacombs of Callistus on the Appian Way in Rome (260) West, before the Schism 4 March
Martyrs of Rome, a large number of martyrs martyred in Rome under Alexander Severus and the prefect Ulpian (219) West, before the Schism 2 March
Martyrs of Rome, including soldier-martyrs Theodosius, Lucius, Mark and Peter, under Claudius II (269) West, before the Schism 25 October
Martyrs of Rome, many martyrs who suffered in Rome under Diocletian for refusing to give up the Holy Scriptures (c. 303) West, before the Schism 2 January
New Hieromartyrs of Ryazan: Protopresbyters - Anatolius Pravdoliubov, Alexander Tuberovsky, Eugene Kharkov, and Constantine Bazhanov (1937) 10 December
The Holy Martyrs of Scillium beheaded in Carthage (180) West, before the Schism 17 July
Apostles of the 70, Philemon and Archippus, Martyr Apphia (wife of Philemon and Equal to the Apostles), and St. Onesimus, disciple of Saint Paul (c. 109) 22 November
New Hieromartyrs of the Belogorsk St. Nicholas Monastery (Perm) (1918-1919) 12 August
New Martyrs of the Czech-Slovak Church (1942) 5 September
Venerable martyrs of the Daou Penteli Monastery, in Penteli, by Algerian pirate raiders, (end-17th century) 10 April
New Hieromartyrs of the Kamensk Diocese (1937) 6 November
New Hieromartyrs of the Katyn massacre (1940) 17 September
Monk-martyrs and Confessors of the Monastery of Panagia of Kantara, on Cyprus, who suffered under the Latins (1231) 19 May
Holy Apostles of the Seventy 8 April, 8 December
Holy Apostles of the Seventy and Deacons (1st century) 28 July
Apostles of the Seventy Archippus, Philemon, and Onesimus (1st century) 6 July
Apostles of the Seventy Disciples 10 November
Apostles of the Seventy Nymphas and Eubulus (1st century) 28 February
Apostles of the Seventy Silas and Silvanus, and with them Apostles Crescens, Epenetus, and Andronicus (1st century) 30 July
Apostles of the Seventy: Stachys, Amplias, Urban, Narcissus, Apelles and Aristobulus (1st century) 31 October
Venerable Apostles of the Slavs: Cyril and Methodius, Clement of Ohrid, Sava, Angelar, Gorazd and Nahum of Ochrid 17 July
New Hieromartyrs of the St. Nicholas Koryazha Monastery, Arkhangelsk (1918) 17 September
Martyrs of the Theban Legion, along the Rhine (c. 287) West, before the Schism 10 October
Martyrs of Trier, innumerable martyrs slain for Christ in diverse ways, in Trier in Germany under Diocletian (287) West, before the Schism 6 October
Monk-Martyrs of Valeria, in the province of Valeria, Italy, slain by the Lombards (5th century) West, before the Schism 14 March
Martyrs of Zelenetsk (1927) 11 November
New Hieromartyrs of Zilantov Monastery in Kazan (1918) 28 August
Saint Offa of Essex, King of Essex in England, he went to Rome and took up the monastic life (c. 709) West, before the Schism 15 December
Saint Olaf II of Norway (Olav, Tola), King of Norway (1030) West, before the Schism 29 July
Saint Olbian (Albianos), monk 25 May
Hieromartyr Olbian, Bishop of Anaea, and his disciples, in Asia Minor (284-303) 29 May
Saint Oleg Romanovich, Prince of Bryansk (1285) 20 September
New Hieromartyr Olga (1937) 1 March
Righteous Mother Olga Arrsamquq Michael of Kwethluk (Kuiggluk), Alaska, Tanqilria, Wonderworker, Matushka of All Alaska (1979) 27 October
Virgin-Martyr Olga Koshelev (1939) 21 February
New Martyrs Olga Maslennikova (1941) and Theoctista Chentsova (1942) 10 November
New Martyr Olga Vasilievna Evdokimova, in the gulag (1938) 28 January
Blessed Equal-to-the-Apostles Olga, Princess of Russia, named Helen in holy baptism (969) 11 July
Saint Olimpia Tănase of Fărcașa, mother of Venerable Petroniu of Prodromu (1967) 4 July
Saint Olimpiada (Strigalova) of Arzamas, schemanun (1828) 7 August
Saint Olimpiada, Schemanun, founder and benefactor of Văratec Monastery, disciple of St. Paisius Velichkovsky of Neamț, St. Joseph of Văratec, and Venerable... (1842) 17 August
Saint Oliva of Anagni, a nun at Anagni near Rome (492) West, before the Schism 3 June
Saint Oliva of Brescia, martyred in Brescia in the north of Italy, under the Emperor Hadrian (138) West, before the Schism 5 March
Saint Oliver of Ancona (Oliverius, Liberius), a monk at Santa Maria di Portonuovo in Ancona in Italy (c. 1050) West, before the Schism 3 February
Saint Olivia of Palermo, a virgin-martyr venerated in Palermo in Sicily and in Carthage in North Africa (463) West, before the Schism 10 June
Martyrs Olympia, Abbess of Mytilene, and nun Euphrosyne (1235) 11 May
New Martyr Olympiada Verbetskaya, Abbess of Kozelshchinsk Convent , Poltava (1938) 20 May
Martyr Olympiades (Olympias), a noble from Rome (ex-consul) martyred in Amelia in Italy under Diocletian (c. 303) West, before the Schism 1 December
Righteous Olympias the Deaconess, of Constantinople (410) 25 July
Martyr Olympiodora, who was burned alive 31 December
Martyr Olympios the Prefect (Olympius the Eparch), Byzantine noble martyred under the Persian King Chosroes II for confessing the Orthodox Faith (c. 610-641) 3 August
Saint Olympius, Bishop and Confessor, in Thrace (4th century) 12 June
Saint Omer (Audomarus), Bishop of Therouanne (670) West, before the Schism 9 September
New Hieromartyr Onesimus (Pylaev), Bishop of Tula (1937) 14 February
Saint Onesimus of Gaul, fifth Bishop of Soissons in France (361) West, before the Schism 13 May
Saint Onesimus of Magnesia, Monk and Wonderworker of Caesarea in Palestine (c. 284-305) 14 July
Apostle Onesimus of the Seventy (c. 109) 15 February
Saint Onesimus, Archbishop of Ephesus (c. 107–117) 1 December
Saint Onesimus, of the Seventy Apostles (c. 68) West, before the Schism 16 February
Venerable saints Onesiphoros, Pammegistos, Pamphoditis, Paphnutios, Pegon, Polemios, Sozomenos, Soterichos and Photios, of the "300 Allemagne Saints" of Cyprus (12th century) 18 July
Martyrs Onesiphorus and Porphyrius of Ephesus (284–305) 9 November
Venerable Onesiphorus the Confessor, of the Kiev Caves (1148) 9 November
Saint Onesiphorus, born in Constantinople, ascetic in Cyprus and Wonderworker 13 July
Venerable Onisim of the Caves, recluse of the Kiev Caves Monastery (12th-13th century) 21 July
Martyr Onisius (Onesimus) of Isauria, by beheading (1st century) 5 March
Venerable Onuphrios of Preveza, of the Monastery of the Birth of the Theotokos, in Coronisia in Arta, Greece (18th century) 12 June
New Hieromartyr Onuphrius (Gagalyuk), Bishop of Kharkov (1938) 1 June
Saints Onuphrius and Auxentius, monks, of Vologda (15th-16th century) 12 June
Saint Onuphrius of Katrom Monastery, founder of Katrom Monastery in Vologda (16th century) 12 June
Venerable Onuphrius of Malsk, founder of Malsk Monastery in Pskov, Wonderworker (1492) 12 June
Venerable Onuphrius of Vorona, Moldavia (1789) 9 September
Saint Onuphrius the Fool-for-Christ, of Romanov-Borisoglebsk 12 June
Venerable Onuphrius the Great (4th century) 12 June
Venerable Onuphrius the Silent, of the Kiev Caves (12th century) 21 July
Saint Onuphrius the Wonderworker, of Gareji, Georgia (1733) 29 September
New Martyrs Onuphrius, Bishop (1938), and those with him 12 June
Saint Opportuna of Montreuil, sister of St Chrodegang, Bishop of Séez, Abbess at the convent of Monteuil (c. 770) West, before the Schism 22 April
Saint Optatian (Ottaziano), Bishop of Brescia in Italy c. 451-505 (c. 505) West, before the Schism 14 July
Saint Optatus, Bishop of Auxerre in France (c. 530) West, before the Schism 31 August
Saint Optatus, Bishop of Milevum in Numidia (376) West, before the Schism 4 June
Venerable Or (Horus) of the Thebaid (390) 7 August
Martyr Oraiozela of Byzantium, near the Bosphorus, under Domitian (c. 81–96) 26 July
Saint Oran of Iona (Otteran, Odhran, Odran), monk of Iona Abbey (c. 563) West, before the Schism 27 October
Martyrs Orentius and Patientia, husband and wife who lived at Loret near Huesca in Spain, parents of St. Laurence the Martyr (240) West, before the Schism 1 May
Saint Orentius of Auch (or Orientius), a hermit in the Lavendan valley near Tarbes in France, Bishop of Auch (Augusta Ausciorum) for over 40 years (c. 439) West, before the Schism 1 May
Martyrs Orentius, Pharnacius, Eros, Firmus, Firminus, Cyriacus, and Longinus, near Lazica (4th century) 24 June, 25 June
Martyr Orestes of Cappadocia (304) 10 November
Martyrs Oriculus and Companions, martyrs under the Arian Vandals near Carthage in North Africa (c. 430) West, before the Schism 18 November
Martyr Orion, by being buried alive 10 November
Saint Ormond (Armand), monk of the monastery of Saint Mairé in France, where he became abbot (6th century) West, before the Schism 23 January
Holy Orthodox Martyrs burned in the Temple, in Carthage, by the Arians 7 December
Saint Ortisios (Orsiesius) of Tabennisi, disciple of St. Pachomius the Great (c. 308 or 380) 15 June
Saint Osburga of Coventry, Abbess and Virgin (c. 1015) West, before the Schism 30 March
Saint Osmanna (Argariarga), a holy virgin who left Ireland for Brittany and became an anchoress in a hermitage near Saint-Brieuc (c. 650) West, before the Schism 9 September
Saint Osmanna (Osanna), a nun at the convent of Jouarre in France (c. 700) West, before the Schism 18 June
Saint Ostianus, a saint venerated at Viviers in France West, before the Schism 30 June
Martyr Oswald of Northumbria, King of Northumbria (642) West, before the Schism 5 August
Saint Oswald of Worcester, Archbishop of York (992) West, before the Schism 29 February
Martyr Oswine of Deira, king of Deira (651) West, before the Schism 20 August
Saint Oswy, King of Northumbria (670) West, before the Schism 15 February
Martyr Osyth (Osith), Princess of Chich, England (c. 700) West, before the Schism 7 October
Saint Otmar, abbot and monastic founder in Switzerland (759) West, before the Schism 16 November
Saint Oudaceus (Eddogwy), third Bishop of Llandaff in Wales (c. 615) West, before the Schism 2 July
Saint Ouen (Audöenus, Audoin, Aldwin, Owen, Dado), Archbishop of Rouen, Gaul, Confessor (c. 683) West, before the Schism 24 August
Saint Owen (Owin), a monk at Lastingham in England with St Chad, then settled at a monastery near Lichfield (ca. 680) West, before the Schism 4 March