Surname Wiyakarn (Wiyakarn 
) , in all the world, is an extremely rare family name. The family name Wiyakarn is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Wiyakarn is the forename as well as the last name.
Usaha, Meesup, Sinman, Sanghuachang, Phanboot, and Thitajaree