Surname Jędrzejczak (Jędrzejczak 
, Енджейчак 
) , worldwide, is quite a rare last name. The family name Jędrzejczak is habitual in Poland, where it is quite a rare surname, Belarus, where it is a very rare surname, and Netherlands. Not in comparison with a country's population, it is the most numerous in Poland, Belarus, and Germany.
| VARIANT | COUNTRY |
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| Jędrzejczak | United Kingdom, Netherlands, Poland, France, Germany |
| Енджейчак | Ukraine, Belarus |
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wiesław wiktor jędrzejczak Polish hematologist, PL (b. 1947) |
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tadeusz jędrzejczak politician, PL (b. 1955) |
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| stanisław jędrzejczak PL (b. 1907) |
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tomasz jędrzejczak Polish politician, PL (b. 1981) |
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| janusz jędrzejczak PL (b. 1921) |
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otylia jędrzejczak Polish swimmer, PL (b. 1983) |
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| grzegorz jędrzejczak Polish economist, national administration employee and university teacher (b. 1951) |
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| danuta jędrzejczak Polish classical philologist, PL (b. 1952) |
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| joanna jędrzejczak Polish physician, PL (b. 1957) |
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| małgorzata jędrzejczak Polish sportsperson, PL (b. 1966) |
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| renata jędrzejczak researcher |
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| monika jędrzejczak-czechowicz Polish clinical immunologist, PL |
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| szymon jędrzejczak Polish sportsperson (1986-2005), PL (b. 1986) |
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| piotr bogusław jędrzejczak PL |
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Ala, Karol, Kamil, Kasia, Kinga, Paweł, Piotr, Radek, Rafał, Roman, Daria, Darek, David, Dawid, Jacek, Jarek, Jakub, Jerzy, Julia, Tomek, Edyta, Emila, Beata, Agata, Artur, Ariel, Aga, Jan, Ewa, Ola, Maja, Sara, Alex, Anna, Ania, Adam, Hanna, Kuba, Igor, Olga, Maria, Marta, Marek, Magda, Mirek, Alina, Anita, Aneta, Lech, and Filip