Family name Dilanjan (Диланян 
, Dilanjan 
) , all over the world, is quite a rare cognomen. The surname Dilanjan is characteristic of Sri Lanka, where it is a rare surname, Russia, and Belarus. Also, Dilanjan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Диланян | Armenia, Russia, Ukraine, Belarus |
| Dilanjan | Sri Lanka, Malaysia, Australia, United States, India |