Succeeded his kinsman Fergus in 671; killed Dunchad (k. of Oriel) in 677 and burned Dun-Ceithirn 9and with it Dunghal (k. of the Irish Picts), and also Cenndaeladh (k. of Keenaght)); was killed in battle at Leathairbhe in rivalry against his kinsman Congal (k. of Tir Cinaill)