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