Last name Дейан (Dejan 
, Deyan 
, Deian 
) , in the entire world, is a common surname. The last name Дейан is characteristic of Southern Europe, particularly North Macedonia, where it is a widespread surname, Montenegro, where it is quite a common surname, and Serbia (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in North Macedonia, Serbia, and Philippines. More frequently, Дейан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dejan | North Macedonia, Bosnia and Herzegovina, Serbia, Slovenia, Croatia |
| Deyan | Philippines, Bulgaria, United States, Indonesia, Serbia |
| Deian | Romania, Germany, France, Bulgaria, United States |
| Дейан | Russia |