Cognomen Arunachalan (Arunachalan 
) , globally, is a rare surname. The last name Arunachalan is habitual in Malaysia, where it is a rare surname, India, where it is an extremely rare surname, and China. Also, Arunachalan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arunachalan | China, Malaysia, United States, India, Canada |
| arunachalan m Recipient of Vir Chakra, IN |
|