Cognomen Pleshak (Pleshak 
, Плешак 
) , globally, is a rare family name. The cognomen Pleshak is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Russia, where it is a very rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Pleshak | Canada, United States, Belarus |
| Плешак | Russia, Ukraine, Belarus |