Cognomen Олег-Григорій (Олег-Григорій 
) , globally, is an extremely rare family name. Much more frequently, Олег-Григорій 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 Григорій.
| VARIANT | COUNTRY |
|---|---|
| Олег-Григорій | Ukraine |