Cognomen Thongkhamthaen (Thongkhamthaen 
) , in the entire world, is a rare family name. The last name Thongkhamthaen is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thongkhamthaen | Thailand |
Chaiwiwat, Jakkapong, and Jakkrapong