Cognomen Mosyuk (Mosyuk 
, Мосюк 
) , globally, is a rare surname. The cognomen Mosyuk is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Mosyuk | United States, Ukraine |
| Мосюк | Belarus, Russia, Kazakhstan, Ukraine |