Cognomen ฤทธิรักษา (ฤทธิรักษา 
, Rittiraksa ) , in all the world, is a rare family name. The family name ฤทธิรักษา is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ฤทธิรักษา is the forename as well as the last name.