Last name Sudnik (Sudnik 
, Судник 
) , all over the world, is quite a rare cognomen. The last name Sudnik is characteristic of Belarus, where it is quite a common surname, Poland, where it is quite a rare surname, and Kazakhstan, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Eastern Europe, particularly Belarus, Russia, and Poland. Much less frequently, Sudnik is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sudnik | Canada, Poland, United States, Belarus, Germany |
| Судник | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| ryszard sudnik PL (b. 1845) |
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barbara sudnik-wójcikowska Polish scientist and university teacher, PL (b. 1952) |
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| ivica sudnik (b. 1910) |
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| stanisław sudnik PL (b. 1921) |
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| tadeusz sudnik Polish musician and composer, PL (b. 1955) |
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| john sudnik |
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