Family name Phasuntharatham (Phasuntharatham 
) , across the world, is a very rare cognomen. The family name Phasuntharatham is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phasuntharatham | Thailand |
Narin, Phonprinan, and Phadungsri