Surname Khamphiou (Khamphiou 
) , worldwide, is an extremely rare cognomen. Much more frequently, Khamphiou is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamphiou | Laos, United States, Canada, France |
Thay, Douangphoutha, Phetsomphou, Thammavong, Keomaniphone, Sengthongkham, Phimvongsa, Khounborin, Souvannasane, Boualapha, Brinkley, Manivanh, Norindr, Phaxaypraseuth, Banumas, Thaxaypraseuth, Chang, Meuangmany, and Louangphachaleun