Surname Girnyak (Girnyak 
, Гирняк 
) , around the world, is a rare last name. The surname Girnyak is characteristic of Ukraine, where it is a rare surname, Russia, and Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Girnyak | Russia, Spain, United States, Ukraine |
| Гирняк | Russia, Kazakhstan, Ukraine |