Cognomen Kinahan (Kinahan 
) , in the world, is quite a rare family name. The last name Kinahan is characteristic of Ireland, where it is quite a rare surname, Canada, where it is a rare surname, and New Zealand. Not in comparison with a country's population, it most frequently occurs in Ireland, the United States, and the United Kingdom. Much less frequently, Kinahan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kinahan | Canada, Australia, United States, Ireland, United Kingdom |
| daniel kinahan (1756-1827) (b. 1756) |
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| george kinahan (1791-1853) (b. 1791) |
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| john kinahan (1792-1866) (b. 1792) |
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| daniel kinahan (1797-1859) (b. 1797) |
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| daniel kinahan (born 1821) (b. 1821) |
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| george kinahan (1823-1903) (b. 1823) |
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| maria jane kinahan (1823-1889) (b. 1823) |
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| john robert kinahan Irish botanist (1828-1863), IE (b. 1828) |
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| george henry kinahan Irish geologist, IE (b. 1829) |
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| frederick kinahan (1830-1901) (b. 1830) |
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| charles alfred kinahan (born 1833) (b. 1833) |
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| bessie fead dumas kinahan (1856-1925) (b. 1856) |
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| henry kinahan (1879-1958) (b. 1879) |
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| kinahan cornwallis British diplomat, GB (b. 1883) |
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| cecil kinahan British athlete, GB (b. 1886) |
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