Surname Tchiloian (Чилоян 
, Tchiloian 
) , in all the world, is a rare family name. The cognomen Tchiloian is characteristic of Russia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, Tchiloian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Чилоян | Armenia, Russia |
| Tchiloian | United States |