Family name Cupryjak (Cupryjak 
) , in the world, is a very rare last name. The last name Cupryjak is characteristic of Poland, where it is a rare surname, Germany, where it is an extremely rare surname, and the United States. More prevalently, Cupryjak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cupryjak | Germany, Poland, United States |