Family name Сосян (Сосян 
, Sosian 
, Sosyan 
) , all around the world, is a rare last name. The surname Сосян is characteristic of Lithuania, where it is a rare surname, Armenia, and Russia, where it is a very rare surname. In absolute terms, it is the most numerous in Russia, Lithuania, and Ukraine. Also, Сосян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Сосян | Armenia, Russia, Ukraine |
| Sosian | India, Kenya, United States |
| Sosyan | Lithuania, Armenia, United States, Russia, India |