Family name Phornvitayavej (Phornvitayavej 
) , all around the world, is a very rare surname. The last name Phornvitayavej is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phornvitayavej | Thailand |
Thanjira, and Phornsawan