Surname O'Kelly (O'Kelly 
, أوكيلي) , in the entire world, is quite a rare family name. The surname O'Kelly is characteristic of Ireland, where it is quite a common surname, Australia, where it is a rare surname, and the United Kingdom. Not in comparison with a country's population, this name is the most popular in Ireland, the United States, and the United Kingdom. Very seldom, O'Kelly is the forename as well as the last name.
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| O'Kelly | Ireland, United Kingdom, France, United States, Australia |
| charles o'kelly Irish soldier and writer (b. 1621) |
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dennis o'kelly Irish breeder of thoroughbred racehorses, IE (b. 1728) |
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james o'kelly American clergyman (b. 1735) |
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| patrick o'kelly Irish writer (b. 1754) |
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| andré-étienne-joseph o'kelly Belgian politician (1755-1815), FR (b. 1755) |
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| john james o'kelly (b. 1749) |
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| festus o'kelly, count o'kelly (1771-1834) (b. 1771) |
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james joseph o'kelly Irish nationalist journalist and politician (b. 1845) |
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aloysius o'kelly Irish artist, IE (b. 1853) |
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| cornelius joseph o'kelly, count o'kelly (1803-1892) (b. 1803) |
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| george denis o'kelly templer (1815-1872) (b. 1815) |
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john j. o'kelly Irish politician, author and publisher (1872-1957), IE (b. 1872) |
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| joseph o'kelly Irish composer, pianist and choral conductor, FR (b. 1828) |
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| auguste o'kelly Franco-Irish music publisher (b. 1829) |
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gerald edward o'kelly de gallagh et tycooly Irish diplomat, IE (b. 1880) |
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