Henry O'Neill (Irish: Anrí Ó Néill) was a king of Tyrone and lord of Clandeboye in medieval Ireland.
In 1338 O'Neill as part of a peace treaty was granted a war-ravaged region of south Antrim, from where would be founded the lordship of Clandeboye.
[1] In 1345 the Justiciar of Ireland, Ralph de Ufford, deposed O'Neill as king of Tyrone in part for his role in the Anglo-Norman rebellion against William Donn de Burgh, 3rd Earl of Ulster.
In his place de Ufford installed Áed Remar O'Neill, son of Donnell.
This biography of an Irish noble is a stub.