Family name Phalapiyaphan (Phalapiyaphan 
) , in all the world, is a rare cognomen. The surname Phalapiyaphan is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phalapiyaphan | Thailand |
Namsang, Oraphin, and Puangthong