Family name Pernjak (Pernjak 
) , throughout the world, is a very rare surname. The cognomen Pernjak is habitual in Croatia, where it is quite a rare surname, Austria, where it is a rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pernjak | Austria, Croatia, Germany |
| judith pernjak Austrian association football player, AT |
|