bishop. All that we know of him comes from a Life in the Book of Llan Dav (c.1150), which may incorporate some older material. According to this, Oudoceus came from a princely Breton family, which migrated to Wales c.545, where Oudoceus was born soon after. During his early manhood Anglo-Saxon invaders penetrated into western Britain and the battle of Dyrham (577) separated the Welsh from Devon and Cornwall, leaving the Severn valley open to invasion and settlement. Oudoceus was a monk in Llandogo (where he became bishop c.580), having persuaded the abbots of Llancarfan, Llantwit, and Llandough to combine against a corrupt local chieftain. In this respect he may be perhaps considered as a distant precursor of the formation of the see of Llandaff. The presence of Oudoceus in numerous English calendars, including Sarum, York, and Hereford, with several monastic examples too, is probably due to the legend that he presented himself to Augustine of Canterbury for consecration. His shrine remained at Llandaff until 1540. Feast: 2 July.
AA.SS., Iul. I (1719), 284–5; N.L.A., ii. 273; Baring-Gould and Fisher, iv. 28–36; G. H. Doble, Lives of the Welsh Saints (1971).