Cognomen Czerniak (Czerniak 
, צ'רניאק 
) , in the entire world, is quite a common surname. The surname Czerniak is habitual in Poland, where it is quite a rare surname, Israel, and Ireland, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Poland, the United States, and Israel. Likewise, Czerniak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Czerniak | Brazil, Poland, France, United States, Germany |
| צ'רניאק | Israel |
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moshe czerniak Polish-Israeli chess player, PL (b. 1910) |
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| stanisław czerniak (b. 1863) |
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| zygfryd czerniak Polish composer, PL (b. 1910) |
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jacek czerniak Polish politician and deputy, PL (b. 1964) |
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| jan czerniak PL (b. 1906) |
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radosław czerniak basketball player (1969-), PL (b. 1969) |
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konrad czerniak Polish swimmer, PL (b. 1989) |
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| stanisław czerniak (b. 1948) |
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| katarzyna czerniak researcher |
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| karolina czerniak researcher |
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| mike czerniak researcher |
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| katarzyna w czerniak researcher (ORCID 0000-0003-0106-0067) |
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| lauren l czerniak researcher |
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| stefania czerniak Polish Righteous Among the Nations, PL |
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| sylwia czerniak PL (b. 1971) |
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