Cognomen Siengkong (Siengkong 
) , in all the world, is a very rare family name. The family name Siengkong is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
Paiboon, Kritsada, Padachamai, Pornpant, Lookpetch, Pisutkanya, Chantrarachay, and Chantrachay