Cognomen พชรรัตน์ (พชรรัตน์ 
, Putcharat , Phtcharat ) , in the world, is an extremely rare surname. The cognomen พชรรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, พชรรัตน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พชรรัตน์, Prtcharat, Phtcharat, Putcharat | Thailand |
Pachararat, and Phachararat