Surname Smoliy (Смолий 
, Smoliy 
) , across the world, is a rare last name. The cognomen Smoliy is characteristic of Eastern Europe, particularly Belarus, where it is a rare surname, Russia, and Hungary. Not in comparison with a country's population, it most frequently occurs in Eastern Europe, particularly Russia, Belarus, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Смолий | Ukraine, Russia, Belarus, Kazakhstan |
| Smoliy | Ukraine, Spain, Russia, Hungary, Canada |