Family name เพ็ชรัตน์ (Petcharat 
, เพ็ชรัตน์ ) , throughout the world, is quite a common cognomen. The surname เพ็ชรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname, and Malaysia, where it is a very rare surname. Also, เพ็ชรัตน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Petcharat | Australia, Thailand, United States, United Kingdom, Malaysia |
| เพ็ชรัตน์ | Thailand |