Cognomen พลธรา (พลธรา 
) , in all the world, is an extremely rare family name. The family name พลธรา is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, พลธรา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พลธรา | Thailand |