Cognomen Ниазян (Ниазян 
, Niazian 
) , in the world, is a rare surname. The surname Ниазян is habitual in Lithuania, where it is a rare surname, Russia, and Greece, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Russia, Iran, and the United States. Also, Ниазян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ниазян | Belarus, Russia, Ukraine, Armenia |
| Niazian | Greece, Iran, Lithuania, Germany, United States |