Cognomen Khienthong (Khienthong 
) , throughout the world, is a very rare family name. The cognomen Khienthong is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Khienthong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khienthong | Canada, India, Thailand |