Cognomen Kongtam (Kongtam 
) , in all the world, is a very rare last name. The family name Kongtam is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
Nisa, Sarun, Sommai, Siriwan, Tanapon, Natchaya, Nuchanat, Chonticha, Rungrawiwan, Prasittichai, and Rattanaporn