Last name ฤทธิ์รัตน์ (Ritrat 
, ฤทธิ์รัตน์ ) , in all the world, is a very rare cognomen. The last name ฤทธิ์รัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ฤทธิ์รัตน์ is the forename as well as the last name.