Surname Chervyak (Chervyak 
, Червяк 
) , in the entire world, is quite a rare last name. The cognomen Chervyak is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Russia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Chervyak | Russia, Ukraine, United States |
| Червяк | Kazakhstan, Russia, Belarus, United States, Ukraine |