Fothad Cairpthech and Fothad Airgthech

Fothad Cairpthech ("chariot-fighter"), and Fothad Airgthech ("ingenious" or "plundering"), sons of Lugaid mac Con, were, according to medieval Irish legend and historical tradition, joint High Kings of Ireland. They came to throne after the death of Cairbre Lifechair. They ruled a year, until Fothadh Airgthech killed his brother, and was himself killed by Caílte mac Rónáin of the fianna, and the followers of Caibre's son Fiacha Sraibhtine, in the Battle of Ollarba. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates their reign to 272–273, the Annals of the Four Masters to 284–285.