Family name Wilczynski (Wilczynski 
, Вильчинский 
, Wilczyński ) , in the entire world, is a common last name. The cognomen Wilczynski is characteristic of Poland, where it is quite a common surname, Belarus, where it is quite a rare surname, and Lithuania. Measured by absolute frequency, the name is most common in Poland, the United States, and Russia. Also, Wilczynski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wilczynski, Wilczyński | Germany, France, Poland, United Kingdom, United States |
| Вильчинский | Kazakhstan, Russia, Ukraine, Belarus |
| ernest julius wilczynski mathematician, US (b. 1876) |
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| karl wilczynski journalist and author (1884-1959), DE (b. 1884) |
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| jozef wilczynski (b. 1922) |
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konrad wilczynski Austrian handball player, AT (b. 1982) |
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| daniel wilczynski French footballer, FR (b. 1956) |
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| walter wilczynski US (b. 1952) |
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| peter wilczynski (b. 1958) |
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| dariusz m. wilczynski Ph.D. Indiana University 1987 |
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| bartek wilczynski Ph.D. Institute of Mathematics, Polish Academy of Sciences 2008 |
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| f. wilczynski researcher ORCID ID = 0000-0002-4560-4444 |
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| stefanie wilczynski German association football player, DE |
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| john wilczynski college basketball player (1988–1991) Akron |
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| ophélie wilczynski researcher |
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| ondřej wilczynski (b. 1979) |
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| joseph wilczynski |
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