Cognomen Kownacki (Kownacki 
, Ковнацький 
, Ковнацкий 
) , in the entire world, is quite a rare surname. The surname Kownacki is habitual in Poland, where it is quite a rare surname, Denmark, where it is a rare surname, and Ukraine. Measured by absolute frequency, it most frequently occurs in Poland, the United States, and Russia. Also, Kownacki is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kownacki | United Kingdom, United States, Germany, Poland, France |
| Ковнацький | Ukraine |
| Ковнацкий | Belarus, Ukraine, Russia, Kazakhstan |
| hipolit kownacki Polish geologist, entrepreneur and pseudo-historian (1761-1854), PL (b. 1761) |
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józef marian kownacki PL (b. 1806) |
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włodzimierz kownacki PL (b. 1890) |
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| józef kownacki (b. 1874) |
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| eugeniusz kownacki Officer of the Polish Army (b. 1890) |
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| jan kownacki PL (b. 1893) |
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| piotr kownacki PL (b. 1895) |
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| andrzej kownacki RU (b. 1897) |
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piotr kownacki PL (b. 1954) |
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bartosz kownacki Polish politician and deputy, PL (b. 1979) |
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andrzej kownacki Polish entomologist, PL |
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| jerzy kownacki polish priest ordained in 1964 (b. 1940) |
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dawid kownacki Polish association football player, PL (b. 1997) |
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| waldemar kownacki Polish actor, PL (b. 1949) |
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| tomasz kownacki Polish political scientist, PL |
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