Surname Delian (Delian 
, 德廉 , Делян 
) , globally, is quite a rare last name. The last name Delian is habitual in Bulgaria, where it is a rare surname, Romania, and Taiwan. Not in comparison with a country's population, it most frequently occurs in Russia, Indonesia, and Taiwan. Likewise, Delian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Delian | Indonesia, Philippines, China, Bulgaria, Brazil |
| 德廉 | China |
| Делян | Ukraine, Kazakhstan, Russia, Belarus, Bulgaria |
| Дельян | Ukraine, Russia |