Cognomen Krasnjak (Krasnjak 
, Красняк 
) , across the world, is quite a rare last name. The family name Krasnjak is habitual in Ukraine, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Krasnjak | Croatia, Germany |
| Красняк | Belarus, Kazakhstan, Russia, Ukraine |