Cognomen Khammounheuang (Khammounheuang 
) , in the entire world, is a rare surname. The last name Khammounheuang is characteristic of Laos, where it is quite a rare surname, Canada, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Khammounheuang | United States, Canada, Laos |