Cognomen Kościuszko (Костюшко 
, Kościuszko 
) , worldwide, is quite a rare surname. The surname Kościuszko is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Poland, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Eastern Europe, particularly Ukraine, Russia, and Poland.
| VARIANT | COUNTRY |
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| Костюшко | Ukraine, Belarus, Kazakhstan, Russia |
| Kościuszko | Poland |
| adam kazimierz kościuszko (b. 1650) |
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| faustyn benedykt kościuszko (b. 1672) |
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| franciszek kościuszko (b. 1675) |
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andrzej tadeusz bonawentura kościuszko Polish and American military leader, National Hero of Poland and United States of America (1746-1817), CH (b. 1746) |
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| ludwik tadeusz kościuszko Father of Tadeusz Kościuszko (b. 1700) |
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| anna kościuszko (b. 1741) |
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| józef kościuszko (b. 1743) |
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| władysław kościuszko (b. 1817) |
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| zbigniew józef kościuszko PL (b. 1906) |
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michał kościuszko Polish racing driver, PL (b. 1985) |
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jakub kościuszko PL (b. 1985) |
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| anna kościuszko |
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| marcin kościuszko |
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| antoni kościuszko |
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| michał kościuszko |
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Eric, Mateusz, Michał, Roksana, Tadeusz, Natalia, Karolina, Martyna, Grzegorz, Magdalena, Alexandra, Agnieszka, Katarzyna, Krzysztof, Przemysław, Jarosław, Małgorzata, Nikola, Joanna, Marek, Agata, Kasia, Paweł, Piotr, Jakub, Tomasz, Julia, Maciej, Monika, Szymon, Adrian, Patryk, Daniel, Filip, and Włodzimierz