Surname พลสิทธิ์ (พลสิทธิ์ 
, Phonlasit , Ponsit 
) , all over the world, is quite a rare family name. The last name พลสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname, Malaysia, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Likewise, พลสิทธิ์ is the forename as well as the last name.