Worldwide, Sumthong (สุมทอง , Sumthong ) is an extremely rare epicene first name. Much more frequently, Sumthong is the last name as well as the forename.
รวมทอง
Somjai, Preeda, Arisara, Areerak, Parichat, Pimchanok, and Nisha Sunattha
, Sumthong 
) is an extremely rare epicene first name. Much more frequently, Sumthong is the last name as well as the forename.