Cognomen Святослав-Євген (Святослав-Євген 
) , across the world, is an extremely rare last name. Much more frequently, Святослав-Євген is the forename as well as the last name. Parts of the name also exists independently as a first name Святослав, and a first name Євген.
| VARIANT | COUNTRY |
|---|---|
| Святослав-Євген | Ukraine |