Surname Zajączkowski (Зайончковский 
, Zajączkowski 
) , all around the world, is quite a rare last name. The surname Zajączkowski is characteristic of Eastern Europe, particularly Poland, where it is quite a rare surname, Russia, where it is a rare surname, and Czechia.
| VARIANT | COUNTRY |
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| Зайончковский | Kazakhstan, Russia |
| Zajączkowski | United Kingdom, Poland, France, Germany, Czechia |
Zajaczkowski, and Заячківський
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józef zajączkowski (1816-1905), PL (b. 1816) |
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liberat zajączkowski UA (b. 1840) |
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| józef zajączkowski (1813-1877), PL (b. 1813) |
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| władysław zajączkowski Polish mathematician, PL (b. 1837) |
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witold zajączkowski Polish naval officer, CA (b. 1892) |
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czesław zajączkowski Major of the Polish Army (b. 1893) |
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| wilhelm zajączkowski (b. 1836) |
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| ladislaus zajączkowski (b. 1837) |
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ananiasz zajączkowski LT (b. 1903) |
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| albin zajączkowski (b. 1860) |
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| adam zajączkowski UA (b. 1877) |
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| stanisław zajączkowski Polish painter (1888-1971), PL (b. 1888) |
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tadeusz zajączkowski Polish-German surgeon, urologist and medical historian, PL (b. 1939) |
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| bolesław zajączkowski Polish commander, PL (b. 1891) |
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| bronisław zajączkowski Polish Righteous Among the Nations, PL (b. 1893) |
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Jan, Szymon, Adrian, Bogdan, Kacper, Konrad, Patryk, Robert, Daniel, Damian, Leszek, Janusz, Józef, Tomasz, Henryk, Hubert, Fabian, Waldek, Witold, Wiktor, Wojtek, Mariusz, Maciek, Maciej, Marcin, Filip, Adam, Kaik, Kuba, Lech, Igor, Marek, Artur, Karol, Kamil, Pawel, Mateusz, Paweł, Radek, Rafał, Darek, Dawid, Janek, Jacek, Jarek, Jakub, Jerzy, Tomek, Piotr, and Michał