Last name Khamvilay (Khamvilay 
) , in all the world, is a rare surname. The family name Khamvilay is characteristic of Laos, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Khamvilay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamvilay | Germany, Thailand, France, Laos, United States |