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Surname พลฤทธิ์ (พลฤทธิ์ , Polrit , Ponrit ) , across the world, is quite a rare cognomen. The family name พลฤทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname. Much less frequently, พลฤทธิ์ is the forename as well as the last name.