Family name Wolnik (Wolnik 
) , globally, is quite a rare cognomen. The cognomen Wolnik is habitual in Poland, where it is quite a rare surname, Germany, where it is a rare surname, and Israel, where it is a very rare surname. Measured by absolute frequency, the name is most common in Poland, Germany, and the United States. Also, Wolnik is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wolnik | Canada, Poland, France, United States, Germany |
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bruno wolnik Roman Catholic clergyman, PL (b. 1882) |
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| ludwik wolnik PL (b. 1889) |
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| aniela wolnik PL (b. 1900) |
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| wilhelm wolnik Polish politician, PL (b. 1935) |
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| kurt wolnik PL (b. 1936) |
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| grzegorz wolnik PL (b. 1964) |
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| elżbieta wolnik Polish sportsperson and athletics competitor, PL (b. 1975) |
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