Family name Foythong (Foythong 
) , globally, is a rare surname. The cognomen Foythong is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname. Much less frequently, Foythong is the forename as well as the last name.
Nat, Somying, Adisorn, Chaiyut, Kheeree, Panneung, Pakjira, Pongsak, Poonyisa, Jaruwan, Jitthai, Jitthip, Tanapon, Netiporn, Wanlaya, Wittaya, Wirasak, Wunlaya, Umpholchai, Siriporn, Siripong, Sirinart, Songsak, Surasak, Siriwan, Methika, Wai, Mote, Uaychai, Suban, Kowit, Lamai, Tanom, Tewee, Somsak, Areeya, Chanchai, Apinun, Khajit, Pairoj, Pranee, Lalita, Thanom, Thipok, Orawan, Walaya, Uatthapon, Mananya, Chanya, and Parichat