Cognomen ขำขุน (Khumkhun 
, ขำขุน) , in the world, is a very rare family name. The family name ขำขุน is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ขำขุน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khumkhun | Thailand |