Last name Phadungchai (Phadungchai 
) , in all the world, is a very rare family name. The surname Phadungchai is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Phadungchai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phadungchai | United States, Thailand |