Last name เพ็ชรราช (เพ็ชรราช 
) , in all the world, is a very rare family name. The last name เพ็ชรราช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เพ็ชรราช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เพ็ชรราช | Thailand |