Cognomen Dupnik (Dupnik 
) , in the entire world, is a rare family name. The family name Dupnik is habitual in the United States, where it is a very rare surname, Germany, and France, where it is an extremely rare surname. Much less frequently, Dupnik is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dupnik | Germany, United States, Poland, France, Brazil |
| clarence dupnik American law enforcement official, US (b. 1936) |
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| kathryn m dupnik researcher (ORCID 0000-0001-7100-2917) |
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