Cognomen สิทธิ์สวาท (สิทธิ์สวาท 
) , in the world, is an extremely rare surname. The last name สิทธิ์สวาท is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, สิทธิ์สวาท is the forename as well as the last name.