Confessor, born possibly Dumbarton, Scotland, c.516;died Houat, Brittany, c570 He studied in Wales and Ireland, where he was ordained. He retired to the isle of Houat, and subsequently founded a monastery at Rhuys on the mainland. He is the earliest British historian; "De excidio Britannire liber querulus" is his chief work. Patron of several churches and monasteries in Brittany and elsewhere; invoked against rabies. Relics in cathedral of Vannes. Feast, January 29,.