Family name O'Carroll (O'Carroll 
) , around the globe, is quite a rare last name. The family name O'Carroll is characteristic of Ireland, where it is quite a common surname, New Zealand, where it is quite a rare surname, and Australia. Not in comparison with a country's population, the name is most common in Ireland, the United Kingdom, and Australia. Very seldom, O'Carroll is the forename as well as the last name.
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| O'Carroll | Ireland, Canada, United Kingdom, United States, Australia |
| mulroney o'carroll Irish chieftain (b. 1470) |
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| jane o'carroll (born 1712) (b. 1712) |
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| caroline ely o'carroll (1784-1816), FR (b. 1784) |
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| carlos o'carroll (b. 1789) |
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| karl august johann emil von hoenning o'carroll (1809-1861) (b. 1809) |
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richard o'carroll Irish trade union activist and military officer, IE (b. 1876) |
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| william augustine o'carroll Irish nationalist and journalist in Australia, AU (b. 1831) |
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| emil johan friedrich freiherr von hoenning o'carroll German archaeologist, DE (b. 1834) |
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| joseph francis o'carroll Irish physician (b. 1857) |
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| jános freiherr von hoenning o'carroll (1864-1954) (b. 1864) |
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| paddy o'carroll Irish hurler (b. 1866) |
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| joseph o'carroll Australian politician and footballer, AU (b. 1891) |
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| walter cormac locke o'carroll GB (b. 1893) |
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brendan o'carroll Irish actor and comedian, IE (b. 1955) |
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| zdenko freiherr von hoenning o'carroll (1906-1996) (b. 1906) |
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