Cognomen Kalynchuk (Калинчук 
, Kalynchuk 
) , in all the world, is quite a rare family name. The cognomen Kalynchuk is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, and Russia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Ukraine, Russia, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Калинчук | Ukraine, Kazakhstan, Belarus, Russia, Kyrgyzstan |
| Kalynchuk | Canada, Spain, Italy, United States, Israel |