Surname Исаян (Исаян 
, Isayan 
, Isaian 
) , throughout the world, is a rare last name. The cognomen Исаян is habitual in Armenia, where it is quite a rare surname, Russia, where it is a rare surname, and Belarus. Not in comparison with a country's population, it most frequently occurs in Russia, the United States, and India. Likewise, Исаян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Исаян | Russia, Kazakhstan, Armenia, Ukraine, Belarus |
| Isayan | Greece, United States, Armenia, India, Canada |
| Isaian | United States, South Africa, Nigeria, India, Canada |
| Isajan | United States, India |