Last name พชรกุลไพสิฐ (พชรกุลไพสิฐ 
) , in the entire world, is an extremely rare surname. The cognomen พชรกุลไพสิฐ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| พชรกุลไพสิฐ | Thailand |