Family name Khathoumphom (Khathoumphom 
) , in the entire world, is quite a rare cognomen. The cognomen Khathoumphom is habitual in South-eastern Asia, particularly Laos, where it is quite a common surname, and Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khathoumphom | Laos, Thailand |