Cognomen Делян (Delian 
, Delyan 
, Делян 
) , around the world, is quite a rare last name. The last name Делян is characteristic of Bulgaria, where it is a rare surname, Romania, and Taiwan. In absolute terms, this name is the most popular in Indonesia, Russia, and Taiwan. More prevalently, Делян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Delian | Philippines, Bulgaria, Brazil, Indonesia, China |
| Delyan | Philippines, Spain, Bulgaria, United States, Angola |
| Делян | Ukraine, Kazakhstan, Belarus, Bulgaria, Russia |
|
делян добрев Bulgarian politician and economist, BG (b. 1978) |
|
| делян пеевски Bulgarian politician (born 1980), BG (b. 1980) |
|