Cognomen Ruangsang (Ruangsang 
) , around the world, is a rare surname. The family name Ruangsang is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Very seldom, Ruangsang is the forename as well as the last name.
Dara, Pornpat, Pimmada, Surasith, Kanokwan, Piyayost, Rachapon, Daoruang, Duangwan, Penthip, Tanaporn, Sittipong, Kanyaphat, Kawinnart, Parichart, Piyanutchanad, Nathakorn, Boonyaporn, Patcharnart, Yuppadee, Theerathep, Pannapa, Suwadee, Santi, Amnat, Pawin, Laong, Jarin, Nitti, Nipit, Sariya, Bang On, Suthin, Amarin, Amnart, Karuna, Panapa, Pakdee, Reenoo, La Ong, Wiroon, Arporn, and Duangruthai