Cognomen Dupek (Dupek 
) , in all the world, is a very rare family name. The family name Dupek is habitual in Poland, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Much less frequently, Dupek is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dupek | New Zealand, United Kingdom, United States, Spain, Poland |