Surname Khamtanh (Khamtanh 
) , around the world, is a rare cognomen. The surname Khamtanh is characteristic of Laos, where it is quite a rare surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, Khamtanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamtanh | Australia, United States, Thailand, Laos, Canada |