Family name O'Donnell (O'Donnell 
, О'Доннелл 
, اودونيل) , across the world, is a common cognomen. The cognomen O'Donnell is characteristic of Ireland, where it is a common surname, Bermuda, where it is quite a common surname, and Australia (explore the name in all countries). Measured by absolute frequency, it is the most numerous in the United States, Australia, and the United Kingdom.
| niall 'garbh' o'donnell, king of tir conaill Peerage person ID=544214 (b. 1380) |
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| finola o'donnell 15th-century Irish noblewoman, IE (b. 1450) |
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| hugh roe o'donnell Lord of Tyrconnell in Ulster from 1461 to 1505 (b. 1450) |
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| calvagh o'donnell Irish king, GB (b. 1515) |
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| edmund o'donnell english Jesuit (b. 1542) |
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| nuala o'donnell member of the O'Donnell dynasty in sixteenth century Ireland (b. 1565) |
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| hugh o'donnell, 2nd earl of tyrconnell Irish soldier of fortune, titular King of Tír Conaill (b. 1606) |
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| mary stuart o'donnell Irish noblewoman, GB (b. 1607) |
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| daniel o'donnell Irish army officer in the French service (b. 1666) |
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| anthony o'donnell Roman Catholic bishop (b. 1681) |
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john o'donnell Baltimore merchant and slave trader (b. 1749) |
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josé o'donnell Irish-Spanish general, ES (b. 1768) |
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sarah chew elliott o'donnell (1768-1855) (b. 1768) |
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| manus o'donnell (born 1720) (b. 1720) |
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| joseph o'donnell Irish soldier (b. 1722) |
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