Cognomen Wainer (Wainer 
, Вайнер 
, Wainen 
) , in all the world, is quite a rare family name. The last name Wainer is habitual in Moldova, where it is quite a rare surname, Argentina, and Russia, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Russia, the United States, and Argentina. Also, Wainer is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wainer | Brazil, Italy, United States, Argentina, Costa Rica |
| Вайнер | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Wainen | India, Israel, United States |
| isaak wainer holocaust victim, b. 1876-02-27, DE (b. 1876) |
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howard wainer American statistician, US (b. 1943) |
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| paula wainer holocaust victim, b. 1896-04-09, DE (b. 1896) |
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| samuel wainer Brazilian journalist (1910-1980), BR (b. 1910) |
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| elías wainer AR (b. 1907) |
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| bertram wainer Australian doctor, AU (b. 1928) |
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| cherry wainer South African musician, ZA (b. 1935) |
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| wainer carvalho ávila Brazilian lawyer and politician, BR (b. 1940) |
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| josé wainer UY (b. 1938) |
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| débora wainer brazilian plastic artist (b. 1954) |
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| irving w. wainer (b. 1944) |
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| wainer lusoli Italian political scientist, IT (b. 1974) |
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| bruno wainer Brazilian flim producer, BR |
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| wainer vandelli particle physicist at CERN |
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| ilana wainer researcher |
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