Surname Khamphathu (Khamphathu 
) , across the world, is a very rare last name. The cognomen Khamphathu is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khamphathu | Thailand |
Srichan, Phoemphun, Nannaphat, and Putcharapan