Family name Lanjan (Lanjan 
) , globally, is a very rare last name. The last name Lanjan is habitual in South-eastern Asia, particularly Malaysia, where it is a very rare surname, Thailand, where it is an extremely rare surname, and Philippines. Also, Lanjan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lanjan | Thailand, United States, Malaysia, Philippines, India |