In the world, เพชรแก้วนา (เพชรแก้วนา, Phetkaeona, Petchkeawna 
) is an extremely rare unknown gender forename. Much more frequently, เพชรแก้วนา is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Petchkeawna | Thailand |
Petchkaewna, and Phetkaewna