Last name Олег-Тадей (Олег-Тадей 
) , in the entire world, is an extremely rare surname. Predominantly, Олег-Тадей 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 Тадей.
| VARIANT | COUNTRY |
|---|---|
| Олег-Тадей | Ukraine |