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