Family name เพ็ชรฤทธิ์ (Petcharit 
, เพ็ชรฤทธิ์ ) , around the world, is a rare cognomen. The surname เพ็ชรฤทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, เพ็ชรฤทธิ์ is the forename as well as the last name.