d.676. Bishop of Lindisfarne. An Irishman, he was sent from Iona, where he was a monk, to succeed Finan, Aidan's* successor, as third bishop of Lindisfarne. He supported King Oswy in maintaining Celtic customs, particularly over the date of Easter. At the Synod of Whitby* in 663/4 he argued for the retention of this practice, and when the decision went in favor of the Roman customs he resigned his see. He took some of the monks of Lindisfarne with him to a monastery at Innisboffin, County Mayo, Ireland, where he remained until his death.