Childebert I
Tudwal was said to be the son of Hoel Mawr (Hoel I) and his wife, Pompeia, and a brother of Saint Lenorius. Tudwal travelled to Ireland to learn the scriptures, and then became a hermit on Saint Tudwal's Island East, off the coast of North Wales. Tudwal later immigrated to Brittany, settling in Lan Pabu with 72 followers, where he established a large monastery under the patronage of his cousin, King Deroch of Domnonée. He traveled to Paris to obtain confirmation of the land grant from King Childebert I, who insisted be was Bishop of Tréguier.