Cognomen Khumsaisaeng (Khumsaisaeng 
) , in all the world, is a very rare family name. The last name Khumsaisaeng is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khumsaisaeng | Thailand |
Anun, Sompratthana, and Jakkraphan