Throughout the world, พีระรัตน์ (Phirarat 
, Peerarat 
, พีระรัตน์ ) is a very rare epicene first name. The first name พีระรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare epicene name. Much less frequently, พีระรัตน์ is the last name as well as the forename.