Surname Khammountha (Khammountha 
) , globally, is a rare cognomen. The last name Khammountha is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khammountha | Laos |
Bounkham, Phet Outhay, and Thongsith