Family name Iaroch (Ярош 
, Iaroch 
) , globally, is a common cognomen. The surname Iaroch is habitual in Eastern Europe, particularly Belarus, where it is quite a common surname, Ukraine, and Russia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ярош | Kazakhstan, Belarus, Azerbaijan, Russia, Ukraine |
| Iaroch | Brazil, Mexico, United States |