Hugh Duff O'Neill ( Irish: ''Aodh Dubh Ó Néill'') was a king of Clandeboye in

medieval Ireland Ireland in the Middle Ages may refer to: * History of Ireland (400–795), Ireland in the early Middle Ages * History of Ireland (795–1169), Ireland in the high Middle Ages *History of Ireland (1169–1536), Ireland in the late Middle Ages See ...

. A son of

Niall Mór O'Neill Niall Mór O'Neill ( Irish: ''Niall Mór Ó Néill'') was a lord of Clandeboye in medieval Ireland. He succeeded his father, Conn O'Neill, to the lordship after his death in 1482. He reigned until his own death in 1512, after which he was succeed ...

, he succeeded his father to the kingship of Clandeboye after his death in 1512. He reigned until his own death in 1524 at the hands of the Cenel Conaill, after which he was succeeded by his brother Brian Ballagh II O'Neill. His daughter, Mary, married Conn Bacagh O'Neill, king of Tyrone, of which one of their sons was Shane O'Neill.''The Irish Law of Kingship, with Special Reference to Ailech and Cenél Eoghain''. James Hogan. Proceedings of the Royal Irish Academy: Archaeology, Culture, History, Literature Vol. 40 (1931/1932), pp. 186-254 (103 pages). Pg. 237

References

Clandeboye 16th-century Irish monarchs O'Neill dynasty {{Ireland-noble-stub