Last name Kogan (Kogan 
, 科根 
, كوجان 
) , throughout the world, is a common surname. The cognomen Kogan is habitual in Israel, where it is quite a common surname, Japan, and Russia, where it is quite a rare surname. Very seldom, Kogan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kogan | Japan, Germany, United States, Argentina, Israel |
| 科根 | China |
| كوجان | Saudi Arabia, Syria, Morocco, Jordan, Iraq |
| Коган | Uzbekistan, Kazakhstan, Russia, Belarus, Ukraine |
| kogan gengei Japanese calligrapher, JP (b. 1748) |
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claude kogan French mountain climber, FR (b. 1919) |
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| grigorij kogan UA (b. 1863) |
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| şneer kogan painter (1875-1940), MD (b. 1875) |
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gerald kogan American judge, US (b. 1933) |
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aron kogan BR (b. 1924) |
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milt kogan American actor, US (b. 1936) |
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| berta kogan holocaust victim, b. 1889-06-21, DE (b. 1889) |
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shulim m. kogan US (b. 1930) |
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itzhak kogan Soviet rabbi, IL (b. 1946) |
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| n. kogan (b. 1888) |
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| belle kogan American industrial designer (b. 1902) |
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| klothilde kogan holocaust victim, b. 1903-12-05, AT (b. 1903) |
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| mischa kogan violist (1904-1983) (b. 1904) |
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richard kogan American psychiatrist, US (b. 1955) |
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