Surname Коган (Kogan 
, Cogan 
, Коган 
) , all over the world, is a common family name. The cognomen Коган is habitual in Israel, where it is quite a common surname, Japan, and Ireland. In absolute terms, the name is most common in Japan, Russia, and the United States. Much less frequently, Коган is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kogan | Israel, United Kingdom, United States, Australia, Japan |
| Cogan | Israel, United Kingdom, United States, Australia, Indonesia |
| Коган | Belarus, Russia, Kazakhstan, Ukraine, Uzbekistan |
| Coggan | United Kingdom, Argentina, United States, Australia, France |
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коган, соломон моисеевич UA (b. 1861) |
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пётр семёнович коган Russian writer and literary critic (1872-1932), BY (b. 1872) |
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коган, наум львович UA (b. 1863) |
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евгений евгеньевич коган Russian physician, RU (b. 1882) |
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коган, нина иосифовна Russian artist (1889-1942), RU (b. 1889) |
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коган, евгения соломоновна UA (b. 1886) |
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коган, григорий михайлович Russian pianist, musicologist and music teacher (1901-1979), BY (b. 1901) |
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леонид борисович коган Soviet musician, UA (b. 1924) |
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| моисей коган Russian Jewish sculptor and printmaker, FR (b. 1879) |
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| наум яковлевич коган BY (b. 1873) |
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| коган, давид моисеевич Soviet architect, UA (b. 1884) |
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| коган, лев рудольфович Soviet specialist in literature (1885-1959), UA (b. 1885) |
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коган, виктор александрович Russian chemist, RU (b. 1936) |
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| коган, александр эдуардович RU (b. 1878) |
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| коган, лазарь иосифович NKVD officer, RU (b. 1889) |
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