Family name Khomonthong (Khomonthong 
) , globally, is a very rare last name. The surname Khomonthong is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khomonthong | Thailand |
Nirawit, Nontaplus, Chedsada, and Wanitchanan