Family name Prathungchaisut (Prathungchaisut 
) , worldwide, is a very rare surname. The surname Prathungchaisut is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Prathungchaisut | Thailand |
Pichai, Aiyawin, Ausaneephorn, Kornkamol, and Chonchanok