Family name Khumjang (Khumjang 
) , around the world, is a very rare cognomen. The last name Khumjang is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khumjang | Thailand |
Visut, Jirawit, Chanapong, Khuansurang, and Kotchakorn