O'Donnell dynasty
| O'Donnell | |
|---|---|
Arms of O'Donnell | |
| Parent house | Northern Uí Néill |
| Country | Kingdom of Tyrconnell |
| Founded | 13th (5th) century |
| Founder | Conall Gulban |
| Current head | Hugo O'Donnell, 7th Duke of Tetuan |
| Final ruler | Ruaidrí, 1st Earl of Tyrconnell, An Ó Domhnaill |
| Historic seat | Donegal Castle |
| Titles | Cenél Conaill:
O'Donnell:
International titles:
|
| Cadet branches | O'Donnell von Tyrconnell |
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The O'Donnell dynasty (Irish: Ó Dónaill or Ó Domhnaill, Ó Doṁnaill or Ua Domaill; meaning "descendant of Dónal") were the dominant Irish clan of the kingdom of Tyrconnell in Ulster in the north of medieval and early modern Ireland.