Surname Piyavajanusorn (Piyavajanusorn 
) , around the globe, is a very rare family name. The surname Piyavajanusorn is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Piyavajanusorn | Thailand |
Rachai, Supanitta, and Chonthicha