Cognomen Kalentchouk (Каленчук 
, Kalentchouk 
) , in all the world, is quite a rare family name. The surname Kalentchouk 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 |
|---|---|
| Каленчук | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Kalentchouk | Canada, United States |