 Oudoceus's 12th-century hagiographic 'life' in the "Book of Llandaff" tells how he was the son of King Budic of Brittany, born in that country shortly after his father's return there from exile in Dyfed.His mother, Anawed, was said to be the sister of Saint Teilo and Budic promised that Oudoceus could train for a life in the Church under him.So Oudoceus came to Wales and eventually succeeded Teilo as Bishop of Llandaff.