Family name Demirdjan (Demirdjan 
) , around the globe, is a very rare cognomen. The family name Demirdjan is habitual in France, where it is a very rare surname, Brazil, where it is an extremely rare surname, and Canada. Not in comparison with a country's population, it is the most numerous in France, the United States, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Demirdjan | Canada, France, Brazil, United States |