Known in Ireland as Coemgen as well as Kevin, according to tradition he was born at the Fort of the White Fountain in Leinster, Ireland, of royal descent. He was baptized by St. Cronan and educated by St. Petroc. He was ordained, and became a hermit at the Valley of the Two Lakes in Glendalough. .
Also called Hierlath, Irish bishop and disciple of St. Patrick. He became bishop of Armagh and aided monastic expansion and the missionary program undertaken in that era.