Surname Matczak (Matczak 
, Матчак 
) , all around the world, is quite a rare cognomen. The last name Matczak is habitual in Poland, where it is quite a rare surname, Ireland, where it is a rare surname, and Ukraine. Measured by absolute frequency, it most frequently occurs in Poland, the United States, and Ukraine. Likewise, Matczak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Matczak | Germany, United Kingdom, United States, Poland, France |
| Матчак | Ukraine, Russia |
| sebastian a. matczak (b. 1914) |
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marcin stanisław matczak Polish law professor, PL (b. 1976) |
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| anna matczak Polish psychologist, PL (b. 1938) |
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filip matczak Polish basketball player (1993-), PL (b. 1993) |
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michał matczak Polish rapper, PL |
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| sławomir matczak Polish journalist, PL (b. 1961) |
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| wojciech matczak ice hockey player (1964-), PL (b. 1964) |
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| karolina matczak researcher ORCID ID = 0000-0002-6374-9356 |
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| soraya matczak researcher |
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| piotr matczak Polish physical chemist, PL |
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| izabela matczak researcher |
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| anna matczak doctoral candidate at the London School of Economics and Political Science |
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| katarzyna matczak Ph.D. Politechnika Warszawska 2004 |
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| piotr matczak Polish sociologist, PL |
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| mike matczak American ice hockey defenceman, US (b. 1988) |
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