Surname Khunphaen (Khunphaen 
) , in the entire world, is an extremely rare cognomen. The surname Khunphaen is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, Khunphaen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khunphaen | Thailand |