Cognomen Terdphadungchai (Terdphadungchai 
) , across the world, is a very rare surname. The surname Terdphadungchai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Terdphadungchai | Thailand |
Rayuuda, and Chatchawan