Family name Олег-Ілля (Олег-Ілля 
) , worldwide, is an extremely rare last name. Much more prevalently, Олег-Ілля is the forename as well as the last name. Parts of the name also exists independently as a first name Олег, and a first name Ілля.
| VARIANT | COUNTRY |
|---|---|
| Олег-Ілля | Ukraine |