Surname Faidyuk (Faidyuk 
, Файдюк 
) , throughout the world, is a rare last name. The surname Faidyuk is characteristic of Ukraine, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Faidyuk | Russia |
| Файдюк | Kazakhstan, Ukraine, Russia |