Cognomen Kanthongdang (Kanthongdang 
) , worldwide, is a very rare family name. The family name Kanthongdang is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Kanthongdang is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kanthongdang | Thailand |