Surname พรถาวร (พรถาวร 
, Porntaworn , Porntavorn ) , all around the world, is a very rare family name. The family name พรถาวร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Porntavorn, Porntaworn, Phontaworn, พรถาวร | Thailand |
Phonethavong, Phonthavon, Phonthawan, Phornthawul, Pohnthaworn, Pornthavorn, Pornthaworn, and Pronthaworn