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