Cognomen Derca (Derca 
) , all over the world, is a very rare last name. The surname Derca is habitual in Slovenia, where it is quite a rare surname, Serbia, where it is a rare surname, and Venezuela, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Serbia, Slovenia, and Brazil. Very seldom, Derca is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Derca | Serbia, United States, Slovenia, Brazil, Venezuela |