Last name ขวัญฤทธิ์ (ขวัญฤทธิ์ 
, Khwanrit ) , in the world, is a very rare family name. The surname ขวัญฤทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ขวัญฤทธิ์ is the forename as well as the last name.