Family name นนทฤทธิ์ (นนทฤทธิ์ 
, Nontarit , Nontharit ) , all around the world, is a rare surname. The cognomen นนทฤทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, นนทฤทธิ์ is the forename as well as the last name.