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