Surname Ілля-Олесь (Ілля-Олесь 
) , globally, is an extremely rare family name. Much more frequently, Ілля-Олесь 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 Олесь.
| VARIANT | COUNTRY |
|---|---|
| Ілля-Олесь | Ukraine |