Surname Khamphay (Khamphay 
) , in all the world, is a rare cognomen. The surname Khamphay is characteristic of Laos, where it is quite a common surname, Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Khamphay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamphay | Thailand, France, Canada, Laos, United States |