Across the world, พิบูลย์รัตน์ (พิบูลย์รัตน์ 
) is a very rare epicene first name. The first name พิบูลย์รัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare unisex name. Very seldom, พิบูลย์รัตน์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| พิบูลย์รัตน์ | Thailand |