Corc mac Luigthig (born 340), also called
Conall Corc,
Corc of Cashel, and
Corc mac Láire, is the hero of
Irish language tales which form part of the origin legend of the
Eóganachta, a group of kindreds which traced their descent from Conall Corc and took their name from his ancestor
Éogan Mór. The early kindred they belonged to are known as the
Deirgtine. He was probably a grandson of
Ailill Flann Bec, and possible cousins were
Dáire Cerbba and the famous
Crimthann mac Fidaig. The latter is his opponent in a celebrated cycle of stories.