General Notes

Ruled jointly with his brother, Fergus, who may have been his twin. They campaigned together, defeating and mortally wounding Eogan (K. of Connaught) in 558 on the river Sligo; defeating Ailill (k. of Connaught), who tried to escape battle in his war chariot in 549 and was killed; and winning the battle of Cul-Dreimhe in 561 against their kinsman, Diarmaid (k. of Ireland) because Diarmaid had offended their cousin St. Columba; also defeated the Irish Picts in 562, and the Leinstermen in 563; died of the plague.