Surname Khamsavay (Khamsavay 
) , in the world, is an extremely rare last name. Much more prevalently, Khamsavay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamsavay | Laos, United States, Thailand |
Odomsouk, Udomsouk, Senekithchanoulack, Keomounmany, Xayarath, Phomdouangsy, Phimmasone, Phommachanh, and Thongsavanh