Surname Phaungphansak (Phaungphansak 
) , worldwide, is a very rare cognomen. The last name Phaungphansak is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phaungphansak | Thailand |
Baitei, Baitoei, and Phatcharin