Family name เพชรแสงสว่าง (เพชรแสงสว่าง, Phetsaengsawang 
) , in the world, is an extremely rare surname. The last name เพชรแสงสว่าง is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phetsaengsawang | Thailand |