Calvagh O'Donnell Calbhach Ó Domhnaill | |
|---|---|
| King of Tyrconnell | |
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| Tenure | 1563–1566 |
| Successor | Hugh McManus O'Donnell |
| Born | c. 1515 Tyrconnell, Ireland |
| Died | 26 October 1566 (aged about 51) Tyrconnell, Ireland |
| Father | Manus O'Donnell |
| Mother | Joan O'Reilly |
Calvagh O'Donnell (Irish: Calbhach Ó Domhnaill; c. 1515 – 26 October 1566), eldest son of Manus O'Donnell, was an Irish King of Tyrconnell of the mid-16th century. He was king and chief of the O'Donnell dynasty based in Tyrconnell in western Ulster. He is best known for his conflict with Shane O'Neill – a dispute that involved the intervention of the English government in Ireland on Calvagh's side.