Cognomen ภักดีไพศาล (ภักดีไพศาล 
, Phakdiphaisan , Phakdeephaisan ) , throughout the world, is a rare last name. The family name ภักดีไพศาล is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phakdeephaisan, ภักดีไพศาล, Phakdiphaisan | Thailand |