Cognomen Севастіян (Севастіян 
, Sevastijan 
) , throughout the world, is a very rare last name. The surname Севастіян is characteristic of North Macedonia, where it is a rare surname, and Ukraine. Very seldom, Севастіян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Севастіян | Ukraine |
| Sevastijan | North Macedonia |