Cognomen Andrzejczak (Andrzejczak 
) , in the world, is quite a rare surname. The cognomen Andrzejczak is characteristic of Poland, where it is quite a rare surname, Ireland, where it is a rare surname, and France. In absolute terms, it most frequently occurs in Poland, the United States, and France. More prevalently, Andrzejczak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Andrzejczak | United Kingdom, Poland, United States, France, Germany |
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felicjan andrzejczak Polish musician and vocalist, PL (b. 1948) |
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janusz andrzejczak PL (b. 1956) |
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rajmund andrzejczak Lieutenant General, Chief of the General Staff of the Polish Army, PL (b. 1967) |
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bob andrzejczak American politician, US (b. 1986) |
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| grzegorz andrzejczak Polish mathematician (b. 1955) |
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| bogusław andrzejczak Polish politician, PL (b. 1956) |
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| leszek andrzejczak Polish sportsperson, PL (b. 1959) |
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| andrzej andrzejczak Polish politician and deputy, PL (b. 1960) |
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| ryszard andrzejczak (b. 1956) |
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| dariusz andrzejczak Polish pharmaceutical scientist, PL |
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| agnieszka andrzejczak researcher |
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| olga andrzejczak researcher |
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| jakub andrzejczak Polish long jumper and triple jumper, PL (b. 1998) |
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| konrad andrzejczak PL (b. 1996) |
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