Surname Ростомян (Ростомян 
, Rostomyan 
) , across the world, is a rare last name. The last name Ростомян is habitual in Armenia, where it is quite a rare surname, Russia, where it is a rare surname, and Ukraine. Not in comparison with a country's population, this name is the most popular in Russia, Armenia, and the United States. Also, Ростомян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ростомян | Ukraine, Russia, Armenia |
| Rostomyan | Greece, Russia, Germany, United States, Armenia |