Cognomen เพ็ญไพรัตน์กุล (เพ็ญไพรัตน์กุล 
) , in the world, is a very rare last name. The surname เพ็ญไพรัตน์กุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| เพ็ญไพรัตน์กุล | Thailand |