Surname Cotner (Cotner 
) , around the world, is quite a rare cognomen. The surname Cotner is habitual in Israel, where it is quite a rare surname, the United States, where it is a rare surname, and New Zealand, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Israel, and China.
| VARIANT | COUNTRY |
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| Cotner | Canada, Israel, United States, United Kingdom, China |
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samuel cotner American banker (1842-1912), US (b. 1842) |
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june cotner American writer (b. 1950) |
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| robert cotner American historian (b. 1906) |
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| keoke cotner professional golfer, US (b. 1971) |
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| victor cotner researcher |
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| carl frank cotner Ph.D. University of California, Berkeley 1995 |
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| sehoya cotner American biologist, US |
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| james b. cotner researcher |
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| bridget a cotner researcher |
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| shane cotner college basketball player (1977–1979) Columbia |
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| carl cotner |
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| ben cotner |
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