Surname Ковалёв (Kovalev 
, Ковалёв 
, Kovalyov 
, among others...) , in the world, is a common cognomen. The surname Ковалёв is habitual in Belarus, where it is quite a common surname, Estonia, and Lithuania (explore the name in all countries). Measured by absolute frequency, the name is most common in Belarus, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
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| Kovalev | Belarus, Russia, Lithuania, Germany, United States |
| Ковалёв | Belarus, Ukraine, Moldova, Russia, Kazakhstan |
| Kovalyov | Belarus, Azerbaijan, Russia, Germany, United States |
| Kovaliov | Belarus, Latvia, Russia, Lithuania, United States |
| Kovaljov | Estonia, Russia, Germany, United States, Czechia |
| Kowaljow | United States, Germany, Argentina |
| ковалёв, иван гаврилович RU (b. 1782) |
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ковалёв, иван архипович Russian politician, RU (b. 1862) |
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ковалёв, павел васильевич Ukrainian geographer (1912-1996), UA (b. 1912) |
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ковалёв, александр александрович Soviet sculptor (1915-1991), BY (b. 1915) |
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ковалёв, дмитрий михайлович Russian and Soviet poet (1915-1977), BY (b. 1915) |
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роман викторович ковалёв (b. 1907) |
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ковалёв сергей никитич Soviet and Russian naval engineer, RU (b. 1919) |
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сергей адамович ковалёв Russian politician, RU (b. 1930) |
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ковалёв, иван платонович UA (b. 1921) |
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ковалёв, владимир алексеевич Russian local historian, RU (b. 1935) |
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ковалёв, алексей леонтьевич UA (b. 1925) |
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| ковалёв сергей иванович Soviet historian, RU (b. 1886) |
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ковалёв, юрий яковлевич Russian politician, RU (b. 1937) |
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| николай васильевич ковалёв Russian botanist (1888-1969), RU (b. 1888) |
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александр яковлевич ковалёв Russian politician, RU (b. 1942) |
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