Cognomen Yonphanphak (Yonphanphak 
) , around the globe, is a very rare surname. The family name Yonphanphak is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Yonphanphak | Thailand |
Aunyawee, Phatsita, and Khunthanun