Family name Dagarajan (Dagarajan 
) , globally, is a very rare cognomen. The surname Dagarajan is characteristic of South-eastern Asia, particularly Malaysia, where it is a very rare surname. Much less frequently, Dagarajan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dagarajan | India, Malaysia |
Kogilan, and Dinesh Raj