Last name Мерджан (Mercan 
, Мерджан 
, Merdjan 
) , in all the world, is a common cognomen. The surname Мерджан is habitual in Turkey, where it is quite a common surname, North Macedonia, where it is quite a rare surname, and Malta. In absolute terms, this name is the most popular in Turkey, Germany, and Romania. Very seldom, Мерджан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mercan | Germany, Switzerland, Romania, France, Turkey |
| Мерджан | Ukraine, Russia, Belarus, Bulgaria |
| Merdjan | Indonesia, United States, France, North Macedonia, Turkey |
| Merdzhan | United States, Bulgaria |