Last name Ілля-Ярослав (Ілля-Ярослав 
) , throughout the world, is an extremely rare surname. Much more frequently, Ілля-Ярослав is the forename as well as the last name. Parts of the name also exists independently as a first name Ілля, and a first name Ярослав.
| VARIANT | COUNTRY |
|---|---|
| Ілля-Ярослав | Ukraine |