Cognomen Omel'Yanovich (Omel'Yanovich 
, Омельянович 
) , in the world, is quite a rare family name. The surname Omel'Yanovich is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Omel'Yanovich | Belarus |
| Омельянович | Belarus, Russia, Kazakhstan, Ukraine |