Cognomen Kupras (Kupras 
) , throughout the world, is a rare family name. The family name Kupras is habitual in Poland, where it is a rare surname, Croatia, where it is a very rare surname, and the United States. Not in comparison with a country's population, it most frequently occurs in Poland, the United States, and Germany. More prevalently, Kupras is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kupras | Poland, Canada, Croatia, Germany, United States |