Bp. of Dol in Brittany. Born in S. Wales, he was ordained by St Dubricius and entered the monastery on Caldey Island. He retired to a cave near the R. Severn and attended a synod at which he was made a bishop. Instructed in a vision to leave his monastery, he went to Brittany; there he founded the monastery of Dol, which became a centre of missionary activity. He attended the councils of Paris in 553 and 557. Feast day, 28 July.