Lugaid Luaigne, son of Finnat Már, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power after killing his predecessor, and his father's killer, Bresal Bó-Díbad, and ruled for five or fifteen years, before he was killed by Congal Cláiringnech. The Lebor Gabála Érenn synchronises his reign with that of Ptolemy X Alexander I (110–88 BC) in Egypt.[1] The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 140–135 BC,[2] that of the Annals of the Four Masters to 199–184 BC.[3]
Although presented as an ancestor of the Eóganachta in later medieval genealogies, Lugaid is regarded by T. F. O'Rahilly as one of several late emanations of Lugaid Loígde,[4] ancestor of the Corcu Loígde.