Surname เพชรแก้วนา (เพชรแก้วนา, Phetkaeona, Petchkeawna 
) , in the world, is a very rare family name. The cognomen เพชรแก้วนา is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Petchkeawna | Thailand |
Petchkaewna, and Phetkaewna