Surname Thongyuak (Thongyuak 
) , around the globe, is a very rare family name. The family name Thongyuak is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
Leia, Orapin, Somphot, Piyasit, Jirasak, Piangthong, Natthapong, and Sutthaphong