Last name เพชรชาย (เพชรชาย 
) , across the world, is a very rare family name. The family name เพชรชาย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, เพชรชาย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เพชรชาย | Thailand |