Surname Thongchaeng (Thongchaeng 
) , worldwide, is a very rare cognomen. The last name Thongchaeng is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
Surat, Nipon, Wirat, Vasita, Suparat, Wansiri, Amornrat, Kanchana, Phimtawan, Jitsophis, Naruephon, Yuphawadee, Kantaphong, and Krittaphat