Around the world, ديان (Dejan 
, Dayan 
, Diagne 
) is a common dominantly masculine, but seldom girly first name. The first name ديان is characteristic of Southern Europe, particularly Montenegro, where it is a common masculine name, Croatia, and Serbia (explore the name in all countries). In absolute terms, it most frequently occurs in Serbia, Croatia, and Senegal. Likewise, ديان is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Dejan | North Macedonia, Serbia, Croatia, Bosnia and Herzegovina, Slovenia |
| Dayan | Turkey, Sri Lanka, Philippines, France, Israel |
| Diagne | Turkey, Senegal, United States, France, Democratic Republic of the Congo |
| ديان | Iran, Saudi Arabia, Yemen, Sudan, Iraq |