Family name Czulak (Czulak 
) , throughout the world, is a rare cognomen. The last name Czulak is characteristic of Poland, where it is quite a rare surname, Hungary, where it is a rare surname, and Norway, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Poland, the United States, and Hungary. Also, Czulak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Czulak | Germany, United Kingdom, Hungary, United States, Poland |
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karol czulak Major of the Polish Army, PL (b. 1893) |
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wincenty czulak master sergeant of the Polish Army, PL (b. 1896) |
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| stanisław czulak Polish association football player (1900-1974), PL (b. 1900) |
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| józef karol czulak (1915-1985) bacteriologist and cheese technologist (b. 1915) |
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| wilhelm czulak PL (b. 1912) |
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agnieszka czulak Polish singer, PL (b. 1976) |
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| adam czulak Polish pianist, PL (b. 1970) |
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| joanna czulak researcher (ORCID 0000-0003-0100-8541) |
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