In all the world, สมทรัพย์ (สมทรัพย์ 
, Somsap 
, Somsub ) is a rare unisex first name. The given name สมทรัพย์ is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare gender-neutral name. Likewise, สมทรัพย์ is the last name as well as the forename.