Cognomen Piernik (Pierz 
, Piernik ) , throughout the world, is a rare family name. The cognomen Piernik is habitual in Poland, where it is quite a rare surname, the United States, where it is a very rare surname, and Germany. Also, Piernik is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Pierz, Piernik | Germany, United Kingdom, United States, Poland, France |
| zdzisław piernik Polish virtuoso tuba player, PL (b. 1942) |
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| agnieszka piernik researcher |
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| magdalena piernik researcher (ORCID 0000-0003-3939-9015) |
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