Surname Гилоян (Гилоян 
, Giloyan 
) , throughout the world, is a rare last name. The last name Гилоян is habitual in Armenia, where it is a rare surname, Russia, and Ukraine, where it is an extremely rare surname. Also, Гилоян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Гилоян | Armenia, Russia, Ukraine |
| Giloyan | Armenia, Russia, United States |