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 | Ukraine, Armenia, Russia |
| Sosian | Kenya, India, United States |
| Sosyan | Armenia, United States, India, Lithuania, Russia |