Cognomen สิทธิไกรศร (สิทธิไกรศร 
, Sithikraisorn, Sittikraisorn ) , in the world, is an extremely rare last name. The last name สิทธิไกรศร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, สิทธิไกรศร is the forename as well as the last name.