Cognomen Думанян (Думанян 
, Dumanian 
, Dumanyan 
) , around the world, is a rare last name. The surname Думанян is habitual in Georgia, where it is quite a rare surname, Armenia, and Zambia, where it is a rare surname. Measured by absolute frequency, it is commonest in Russia, Zambia, and Georgia. Also, Думанян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Думанян | Ukraine, Bulgaria, Armenia, Russia |
| Dumanian | Canada, Israel, Argentina, Georgia, United States |
| Dumanyan | Canada, Russia, United States, Zambia, Armenia |