Family name Khwanthong (Khwanthong 
) , across the world, is quite a rare last name. The cognomen Khwanthong is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname, and Singapore, where it is a rare surname. Very seldom, Khwanthong is the forename as well as the last name.
Ai, Yuphin, Malinee, Munliga, Saichol, Siripim, Sukanya, Suwanna, Suwimon, Somporn, Aitsara, Chanita, Chaiwat, Chomsri, Chukiat, Kamchat, Paewpan, Pinyada, Gamlang, Jutarat, Thanika, Wilawan, Wanida, Nikorn, Jariya, Gitiya, Rin, Mali, Arun, Rina, Araya, Aurai, Buhtdee, Kayon, Danet, Hiang, Uraiwan, Wanso, Milynt, Saipin, Surins, Anuwat, Kamjad, Kawita, Pattra, Prasan, Pranom, Duenpen, Yupin, and Sattawut