Cognomen Kernjak (Kernjak 
) , in the entire world, is a very rare last name. The family name Kernjak is habitual in Slovenia, where it is a rare surname, Croatia, and Austria.
| VARIANT | COUNTRY |
|---|---|
| Kernjak | Australia, Croatia, Austria, Slovenia, Germany |
|
pavle kernjak AT (b. 1899) |
|
| miro kernjak SI (b. 1926) |
|