Cognomen อรัญสิทธิ์ (Arantasit 
, อรัญสิทธิ์ ) , in the world, is a very rare family name. The surname อรัญสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, อรัญสิทธิ์ is the forename as well as the last name.