Cognomen Khomphangchan (Khomphangchan 
) , across the world, is a very rare last name. The family name Khomphangchan is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khomphangchan | Thailand |
Chidthinut, and Sitthiwut