Niall Garve O'Donnell

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Niall Garve O'Donnell (Irish: Niall Garbh Ó Domhnaill; 1569 – 1626) was an Irish chieftain, alternately an ally of and rebel against English rule in Ireland. He is best known for siding with the English against his kinsman Hugh Roe O'Donnell during the Nine Years' War in the 1590s.