Surname Ngernthongdang (Ngernthongdang 
) , in the world, is a very rare family name. The family name Ngernthongdang is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ngernthongdang | Thailand |
Pranom, Rattabhum, and Supitchaya