Surname Sunthan (Sunthan 
) , globally, is a rare family name. The cognomen Sunthan is habitual in Malaysia, where it is a very rare surname, Thailand, and India, where it is an extremely rare surname. Also, Sunthan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sunthan | United States, Malaysia, India, Thailand |