Cognomen คำมูล (Khammoon 
, Khammun 
, Kammoon 
) , in all the world, is quite a rare surname. The family name คำมูล is characteristic of Thailand, where it is quite a rare surname, Sweden, where it is a rare surname, and Malaysia, where it is a very rare surname. Very seldom, คำมูล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khammoon | Laos, Thailand, Malaysia, Sweden, India |
| Khammun | Malaysia, India, Thailand, United States |
| Kammoon | Hong Kong, United States, Thailand, France |