Family name Сианосян (Сианосян 
, Sianosyan 
) , throughout the world, is a very rare cognomen. The surname Сианосян is characteristic of Russia, where it is a very rare surname, Kazakhstan, and Ukraine, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Russia, Kazakhstan, and the United States. More prevalently, Сианосян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Сианосян | Ukraine, Russia, Kazakhstan, Armenia |
| Sianosyan | Spain, United States |