Family name พลรัตน์ (พลรัตน์ 
, Ponrat 
, Ponnrat ) , in the world, is quite a rare cognomen. The last name พลรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname, and Malaysia, where it is a very rare surname. Likewise, พลรัตน์ is the forename as well as the last name.