Surname Iloyan (Илоян 
, Iloyan 
) , throughout the world, is a very rare family name. The last name Iloyan is characteristic of Eastern Europe, particularly Russia, where it is a very rare surname. Also, Iloyan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Илоян | Armenia, Russia |
| Iloyan | Philippines |