Family name Wolniak (Wolniak 
) , in all the world, is quite a rare cognomen. The surname Wolniak is characteristic of Poland, where it is quite a rare surname, Ireland, where it is a rare surname, and Germany. In absolute terms, it most frequently occurs in Poland, Germany, and the United States. Also, Wolniak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wolniak | Germany, Italy, United States, Poland, France |
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bogusław wolniak PL (b. 1907) |
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henryk wolniak Polish poet, PL (b. 1939) |
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| zygfryd wolniak Polish politician, PL (b. 1922) |
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| olek wolniak German association football player, DE (b. 1946) |
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| janusz wolniak PL (b. 1960) |
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| sławomir wolniak Polish swimmer, PL (b. 1988) |
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