Family name Petrouchtchak (Петрущак 
, Petrouchtchak 
) , in the world, is a rare last name. The surname Petrouchtchak is characteristic of Ukraine, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Петрущак | Kazakhstan, Ukraine, Russia |
| Petrouchtchak | Canada, United States |