Cognomen จารุสิทธิ์ (จารุสิทธิ์ 
, Jarusit , Charusit ) , all around the world, is a rare family name. The cognomen จารุสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, จารุสิทธิ์ is the forename as well as the last name.