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801–881 · Medieval · Benedictines

Odo I (or Eudes I) was a West Frankish prelate who served as abbot of Corbie in the 850s and as bishop of Beauvais from around 860 until his death in 881. He was a courtier and a diplomat, going on missions to East Francia and the Holy See.

878–942 · Medieval · Benedictines

Odo of Cluny (French: Odon) (c. 878 – 18 November 942) was the second abbot of Cluny. Born to a noble family, he served as a page at the court of Aquitaine. He became a canon of the Church of St. Martin in Tours and continued his education in Paris under Remigius of Auxerre.

1100 · Medieval

Saint Odrada was born in Balen and died in 1100. She is recognized as a saint.

750–865 · Medieval · Benedictines

Odwulf of Evesham (or Odulf, Odulph, Odulfo, Odulphus; died 855) was a ninth century saint, monk and Frisian missionary. Odwulf is recorded in the medieval Secgan hagiography the Medieval Hagiography of Saint Ecgwine and the Ave presul glorioseI Augustine psalter, where he is li…

1070 · Medieval · Benedictines

Offa of Benevento was a Benedictine abbess who died in 1070 in Benevento. She is recognized as a saint in the Catholic Church.

700–709 · Medieval

Offa was King of Essex. D. H. Kirby dates his reign as 705 to 709. Simon Keynes dates it c.694 to 709, when he went on a pilgrimage to Rome, where he died as a monk, along with Cenred, King of Mercia. He may have been co-king with Swæfred.

995–1030 · Medieval

Saint Olaf (c. 995 – 29 July 1030), also called Olaf the Holy, Olaf II, Olaf Haraldsson, and Olaf the Stout or "Large", was King of Norway from 1015 to 1028.

890–969 · Medieval

Olga (Church Slavonic: Ольга; Old Norse: Helga; c. 890–925 – 11 July 969) was a regent of Kievan Rus' for her son Sviatoslav from 945 until 957. Following her baptism, Olga took the name Elenа.

950–1050 · Medieval · Benedictines

Saint Oliver of Ancona - also known as Oliver of Portonuovo, Oliverius or Liberius (died c. 1050), is a saint of the Catholic and Orthodox Christian churches. His feast day is 3 February.

770 · Medieval · Benedictines

Opportuna of Montreuil (died 770) was a Frankish Benedictine nun and abbess. A Vita et miracula Sanctae Opportunae was written within a century of her death (c. 885–88) by Adalhelm (later rendered Adelin), bishop of Séez, who believed he owed his life and his see to Opportuna.

450–563 · Medieval

Oran or Odran (Old Irish: Odrán, Irish: Odhrán; Latin: Otteranus, hence sometimes Otteran; died AD 548), by tradition a descendant of Conall Gulban, was a companion of Saint Columba in Iona, and the first Christian to be buried on that island.

600–600 · Medieval

Saint Oranna of Eschweiler (in German and Dietsch, Oranna) is a Catholic saint who is said to have lived in the 6th century. Commemorated on September 15, she is particularly invoked to relieve earaches and vertigo.

1330–1386 · Medieval

Roland de' Medici (born c. 1330 in Milan, Lombardy; died September 15, 1386, in Borgo San Donnino, Emilia-Romagna) was a 14th-century Italian hermit, considered a blessed by the Catholic Church.

482–580 · Medieval

Ortaire of Landelles, or Saint Ortaire (born c. 482 in Le Dézert, in the Diocese of Coutances; died April 15, 580), was a Norman religious figure of the Early Middle Ages, recognized as a saint by the Catholic Church and commemorated on April 15.

698–750 · Medieval

Osana was a Northumbrian princess, whose local following as a saint developed informally after her death, though she was never officially canonised.

655 · Medieval

Osgyth (or Osyth; died c. 700 AD) was a Mercian noblewoman and prioress, venerated as an English saint since the 8th century, from soon after her death. She is primarily commemorated in the village of St Osyth, in Essex, near Colchester.

1380 · Medieval

Rodion Oslyabya (Russian: Родион Ослябя; monastic name: Andrey or Rodion; secular name: Roman; died 1380 or after 1398) was a Russian monk from the Trinity Lavra of Sergius of Radonezh who became famous for his part in the Battle of Kulikovo.

1100–1099 · Medieval

Osmund (died 3 December 1099), Count of Sées, was a Norman noble and clergyman. Following the Norman conquest of England, he served as Lord Chancellor (c. 1070–1078) and as the second bishop of Salisbury, or Old Sarum.

990 · Medieval · Benedictines

Count Osorio Gutiérrez was a 10th-century figure of medieval Spain who belonged to the Galician nobility and was related to the Astur-Leonese kings.

604–642 · Medieval

Oswald was King of Northumbria from 634 until his death, and is venerated as a saint, of whom there was a particular cult in the Middle Ages. Oswald was the son of Æthelfrith of Bernicia and Acha of Deira and came to rule after spending a period in exile.

1000–992 · Medieval · Benedictines

Oswald of Worcester (died 29 February 992) was Archbishop of York from 972 to his death in 992. He was of Danish ancestry, but brought up by his uncle, Oda of Canterbury, who sent him to France to the abbey of Fleury to become a monk.

650–651 · Medieval

Oswine, Oswin or Osuine (died 20 August 651) was a King of Deira in northern England. Oswine succeeded King Oswald of Northumbria, probably around the year 644, after Oswald's death at the Battle of Maserfield. Oswine was the son of Osric.

1060–1122 · Medieval

Saint Odo of Urgell (Catalan: Ot, Odó or Dot Spanish: Odón) (c. 1065 – 1122) was a bishop of Urgell, noted for his care for the poor. He was from the family of the counts of Pallars Sobirà. He is buried in the monastery of Santa Maria de Gerri.

689–759 · Medieval · Benedictines

Othmar, (also Audomar, c. 689 – c. 759) was a Medieval monk and priest. He served as the first abbot of the Abbey of St. Gall, a Benedictine monastery near where the city of St. Gallen, now in Switzerland, developed.

1060–1139 · Medieval

Otto of Bamberg (1060 or 1061 – 30 June 1139) was a German missionary and papal legate who converted much of medieval Pomerania to Christianity. He was the bishop of Bamberg from 1102 until his death. He was canonized in 1189.

1040–1127 · Medieval · Benedictines

Ottone Frangipane (1040 – 23 March 1127), also known as Saint Ottone (or Saint Otho), was a Benedictine monk and a hermit. He is patron saint of Ariano Irpino and the diocese of Ariano Irpino-Lacedonia.

600–615 · Medieval

Saint Oudoceus (Latin) or Euddogwy (Welsh) (c.536–c.615 or 625) is generally known as the third Bishop of Llandaff in South Wales. In reality he was probably a 7th-century bishop at Llandeilo Fawr. Wendy Davies puts his episcopal reign between about 650 and 700.

500–510 · Medieval

Padarn (Latin: Paternus, Padarnus; Welsh: Padarn; Breton: Padern; ? – c. 550 AD) was an early 6th century British Christian abbot-bishop who founded Saint Padarn's Church in Ceredigion, Wales.

1394–1477 · Medieval

Pafnuzio of Borovsk was an Eastern Orthodox monk born in Borovsk in 1394. He lived and died in Borovsk in 1477 and is recognized as a saint.

850–900 · Medieval

Palerio di Telese was a Catholic priest and bishop born in 850 and deceased in 900. He is recognized as a saint within the Catholic Church.

658 · Medieval

Saint Palladius of Auxerre (died April 10, 657 or 658) was abbot of Saint-Germain (likely occupied by secular clergy at the time) and subsequently Bishop of Auxerre from 622 to 658. His feast day was celebrated on April 10 until 1726, and thereafter on July 30.

550–596 · Medieval

Palladius or more often in French Pallais was a 6th-century bishop of Saintes. According to Gregory of Tours, the family of Palladius was wealthy, and had produced several bishops and teachers throughout the 5th century in Gaul.

650–700 · Medieval

Pamphilus of Sulmona (Italian: Panfilo di Sulmona, died c. AD 700) was bishop of Sulmona and Corfinio (Valva) during the late 7th century. He is revered as a saint by the Catholic Church and the Eastern Orthodox Church.

900 · Medieval

Pandionia (died c. 904; also known as Pandiona or Pandwyna) was an Anglo-Saxon nun and Christian saint, possibly a virgin martyr. Her feast day is 26 August.

541 · Medieval

Pantagathus served as a Catholic priest and bishop. He died in 541 and is recognized as a Catholic saint.

1201–1280 · Medieval

Paolino Bigazzini, also known as Paolino da Coccorano (Perugia, 13th century – Sambuco di Valfabbrica, May 4, 1280), was an Italian Christian monk of the Benedictine Order, belonging to the Sylvestrine Congregation. He is venerated as a saint by the Catholic Church.

1239 · Medieval

Paraskeva of Polotsk, also known as Euphrosyne, Praxedis, and Praxeda (12th century, Polotsk – November 12, 1239, Rome), was a legendary 13th-century princess of Polotsk and a saint (canonized 1273) of the Catholic, Greek Catholic, and Orthodox churches.

1000–1100 · Medieval

Paraskeva of the Balkans, alternatively known as Petka, was an ascetic female saint of the 11th century. She was born in Epivates, near present-day Istanbul, and, according to legends, had visions of the Virgin Mary.

657–737 · Medieval · Benedictines

Saint Pardulphus (Pardulf, Pardoux) (657 – c. 737 AD) was a Frankish saint and Benedictine abbot. The Vita Pardulfi, was written by an anonymous monk around the middle of the eighth century. It is notable for the insight it provides into life in Aquitaine at the time.

1151–1267 · Medieval · Benedictines

Parisius (Italian: Parisio) was a Camaldolese monk and spiritual director. It is believed that Parisius was born in 1160, at either Treviso or Bologna. At the age of twelve, Parisius entered the Camaldolese order.

775–824 · Medieval

Pope Paschal I (Latin: Paschalis I; died 824) was the bishop of Rome and ruler of the Papal States from 25 January 817 to his death in 824. Paschal was a member of an aristocratic Roman family. Before his election to the papacy, he was abbot of St.

792–865 · Medieval · Benedictines

Paschasius Radbertus (785–865) was a Carolingian theologian and the abbot of Corbie, a monastery in Picardy founded in 657 or 660 by the queen regent Bathilde with a founding community of monks from Luxeuil Abbey.

1080–1167 · Medieval

Pascual of Tormellas (Tormellas, c. 1080 – May 3, 1167) was a hermit and ecclesiastic venerated as a saint in the Catholic Church. His exact birth date is unknown, but his friendship with Saint Peter of Barco, a former fellow student, suggests it was around 1080.

501–606 · Medieval

Paterius (died 606) was a bishop of Brescia. He is known as a compiler, in particular of works of Pope Gregory I, for whom he had worked as a notary.

450–562 · Medieval

Paternus, also known as Pair or Patier, born at the end of the 5th century and died around 565, was a hermit, evangelist, founder of monasteries, and later Bishop of Avranches in the first half of the 6th century.

569 · Medieval

Apollinarius served as Greek Patriarch of Alexandria between 551 and 569. Before his appointment by Justinian I, he was a reader of the monastery of Salama.

550–609 · Medieval

Theodore I, also known as Theodore Scribo, served as Greek Patriarch of Alexandria between 607 and 609. Having been appointed by Phocas, he opposed the Heraclian revolt and was killed in the conflict.

664–685 · Medieval

Patricia of Naples (or Patricia of Constantinople) (Italian: Santa Patrizia) (died ca. 665 AD) is an Italian virgin and saint. Tradition states that she was noble; she may have been related to the Roman Emperor.

496–576 · Medieval

Saint Patroclus of Bourges (c. 496–576) was a Merovingian ascetic, who was a native of the province of Berry, France. A deacon at Bourges, he withdrew to become a hermit. In his childhood Patroclus guarded sheep while his older brother, Antonius, pursued an education.

492–573 · Medieval

Paul Aurelian (known in Breton as Paol Aorelian or Saint Pol de Léon and in Latin as Paulinus Aurelianus) was a 6th-century Welshman who became first bishop of the See of Léon and one of the seven founder saints of Brittany.