Surname Kurtjak (Kurtjak 
) , all over the world, is a rare last name. The cognomen Kurtjak is habitual in Bosnia and Herzegovina, where it is quite a rare surname, Croatia, where it is a rare surname, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kurtjak | Croatia, Bosnia and Herzegovina, Ukraine |
| mario kurtjak SI (b. 1989) |
|