Cognomen Топчян (Топчян 
, Topchyan 
, Toptchian 
) , across the world, is quite a rare family name. The family name Топчян is habitual in Armenia, where it is quite a rare surname, Russia, where it is a rare surname, and Belarus, where it is a very rare surname. In absolute terms, this name is the most popular in Russia, the United States, and Armenia. Very seldom, Топчян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Топчян | Ukraine, Belarus, Russia, Kazakhstan, Armenia |
| Topchyan | Canada, Russia, Brazil, United States, Armenia |
| Toptchian | United States, Germany |