Cognomen พหุลรัตน์ (พหุลรัตน์ 
) , in all the world, is a very rare surname. The surname พหุลรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, พหุลรัตน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พหุลรัตน์ | Thailand |