Cognomen Kazmierczak (Kazmierczak 
, Kaźmierczak 
) , all around the world, is a common family name. The last name Kazmierczak is characteristic of Poland, where it is quite a common surname, Ireland, where it is quite a rare surname, and Slovakia. In absolute terms, it is the most numerous in Poland, the United States, and Germany. Likewise, Kazmierczak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kazmierczak | United States, France, Poland, Germany, Brazil |
| Kaźmierczak | United Kingdom, United States, France, Poland, Germany |
Każmierczak, Kázmierczak, and Казмиерцак
| michael kazmierczak German politician (1898-1933), DE (b. 1898) |
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| marie kazmierczak All-American Girls Professional Baseball League player (1920-2000), US (b. 1920) |
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| tadeusz kazmierczak UA (b. 1932) |
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| ludger kazmierczak German journalist, DE (b. 1969) |
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| marcin kazmierczak researcher ORCID ID = 0000-0002-4912-785X |
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| aleksandra kazmierczak researcher, ORCID id # 0000-0001-6704-1892 |
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| maciej kazmierczak researcher |
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| lawrence william kazmierczak Ph.D. Stevens Institute of Technology 2003 |
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| barbara i. kazmierczak researcher |
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| maria kazmierczak researcher (ORCID 0000-0001-7323-2580) |
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| jolanta kazmierczak researcher |
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| claudio de souza kazmierczak researcher (ORCID 0000-0001-7552-3867) |
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| edmund kazmierczak researcher (engineering) |
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| pawel kazmierczak researcher |
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| philipp m kazmierczak researcher (ORCID 0000-0003-0071-1665) |
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