Cognomen รุ่งทรัพย์ (Rungsap 
, Rungsup , Sungsub 
) , around the world, is a very rare surname. The family name รุ่งทรัพย์ is habitual in Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. Likewise, รุ่งทรัพย์ is the forename as well as the last name.