Family name Khamthian (Khamthian 
) , in all the world, is an extremely rare surname. The cognomen Khamthian is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, Khamthian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamthian | India, Thailand |