Family name เพชรกำแพง (เพชรกำแพง, Phetkamphaeng, Phetkampaeng 
) , worldwide, is an extremely rare surname. The surname เพชรกำแพง is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phetkampaeng | Thailand |