Last name Biernacki (Biernacki 
, Бернацкий 
) , around the world, is quite a common surname. The surname Biernacki is habitual in Poland, where it is quite a common surname, Belarus, where it is quite a rare surname, and Norway, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Poland, the United States, and Russia. Likewise, Biernacki is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Biernacki | Canada, Poland, France, United States, Germany |
| Бернацкий | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
Bernacki, Bernatsky, Bernatskyi, Bernazki, Biernacka, Бернацький, Биернацки, and Бєрнацкі
| kazimierz biernacki Polish historian (1629-1725), PL (b. 1629) |
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alojzy prosper biernacki PL (b. 1778) |
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| paweł biernacki Polish nobleman, PL (b. 1740) |
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| casimir biernacki (b. 1740) |
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| józef biernacki Polish general, PL (b. 1774) |
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cezary biernacki Polish historian (1827-1896), PL (b. 1827) |
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| felicjan biernacki PL (b. 1775) |
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mikołaj biernacki PL (b. 1836) |
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edmund biernacki Polish physician, PL (b. 1866) |
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wiktor biernacki Polish physicist (1869-1918), PL (b. 1869) |
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edmund biernacki PL (b. 1886) |
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| michał marian biernacki Polish composer (b. 1855) |
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| michał biernacki PL (b. 1855) |
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| mieczysław józef biernacki PL (b. 1862) |
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| john biernacki (b. 1865) |
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