Muircheartach mac Pilib Ó Ceallaigh
Muircheartach mac Pilib Ó Ceallaigh (Maurice O'Kelly; died 1407 or 1409) was Archbishop of Tuam in Ireland, and patron of the literary compilation An Leabhar Ua Maine. He was a son of Pilib Ó Ceallaigh, and a brother to William Buidhe Ó Cellaigh, King of Uí Maine and Chief of the Name (died c. 1381).