1. Son of a king of Ulster named Lachtighe, grandfather of Conaire Mór. He married Étaín Óg but put her aside when she proved unable to bear sons. His daughter from a previous marriage, whom Étaín Óg sought to have killed, grew up to be Mes Buachalla, wife of Eterscél. He may be identical with Cormac Connloinges.
2. A character in Macpherson's Ossian (1760) described as the ‘king of Ireland’. His daughter Ros-Cranna married Fingal. The son of Arth, also king of Ireland, Cormac was dethroned and murdered by Cairbre. The root of his characterization appears to be borrowed from Cormac mac Airt.
