Cognomen Йосиф-Ярослав (Йосиф-Ярослав 
) , across the world, is an extremely rare family name. Predominantly, Йосиф-Ярослав is the forename as well as the last name. Parts of the name also exists independently as a first name Йосиф, and a first name Ярослав.
| VARIANT | COUNTRY |
|---|---|
| Йосиф-Ярослав | Ukraine |