Tudwal was a 6th-century monk and bishop who is recognized as one of the seven founding saints of Brittany. Born in Tenby, he traveled to Ireland to study the scriptures before living as a hermit on an island near North Wales. He eventually migrated to Brittany with seventy-two followers, establishing a monastery at Lan Pabu under the protection of King Deroch. After securing land rights in Paris from King Childebert I, he was appointed as the Bishop of Tréguier.