Family name เพ็ชรสมุทร (เพ็ชรสมุทร 
) , in the entire world, is a very rare cognomen. The surname เพ็ชรสมุทร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, เพ็ชรสมุทร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เพ็ชรสมุทร | Thailand |