Last name เบญจทรัพย์ (เบญจทรัพย์ 
, Benjasap , Benjasub ) , in all the world, is a very rare cognomen. The surname เบญจทรัพย์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, เบญจทรัพย์ is the forename as well as the last name.