Henry O'Neill

Henry O'Neill (Irish: Anrí Ó Néill; d. 1347), son of Brian O'Neill and grandson of Hugh Boy O'Neill, succeeded his kinsman Donnell O'Neill as king of Tyrone in 1325. In 1338 a peace treaty granted him war-ravaged lands in southern Antrim, where his descendants built up the lordship of Clandeboye.

In 1345 the justiciar Ralph de Ufford deposed him for joining the rising against William Donn de Burgh, Earl of Ulster, and installed Áed Remar O'Neill instead. Henry died in 1347 and his son Muirchertach Ceannfada succeeded him in Clandeboye.