Surname Thongsawang (Thongsawang 
) , all over the world, is a rare family name. The cognomen Thongsawang is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
Udon, Siriluk, Somchai, Chanida, Buntham, Kanjana, Kemjira, Khomsak, Panumas, Prathin, Praethong, Prepaporn, Piyasak, Piyawat, Rungsun, Jarawee, Jaruwan, Jirapat, Nitrada, Nipapun, Wanpaded, Wipawan, Salinee, Sangjan, Sangwan, Mintida, Surin, Sunet, Sujin, A Non, Chana, Jinda, Tawan, Nipon, Sariya, Sirima, Sasithon, Sukhee, Amphon, Aumpha, Atiruj, Banlue, Kasama, Phunna, Jankit, Namped, Nirada, Whaiyawat, Sommat, and Suphawat