Surname Яилоиан (Яилоиан 
, Iailoian 
, Yailoian 
) , across the world, is a rare cognomen. The last name Яилоиан is characteristic of Georgia, where it is quite a rare surname, Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Яилоиан | Russia |
| Iailoian | Russia, Georgia |
| Yailoian | Ukraine |