Family name Kongsom (Kongsom 
) , in all the world, is a rare cognomen. The surname Kongsom is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
Kom, Deeden, Lahong, Jaroon, Thawan, Narita, Narong, Noppon, Wanida, Mr Siltham, Siltham, Sirinun, Sirikul, Sureemon, Chaniya, Chariya, Charouy, Chaiwat, Chaluay, Chaluai, Korawan, Krittin, Phubet, Prapat, Pranob, Palita, Suda, Manop, Malee, Sakda, Sunee, Sunya, Sopit, Chong, Kanit, Kamon, Pararak, Kluan, Leuan, Janya, Tehwit, Ophat, Manita, Savphat, Suchon, Somjai, Apinya, Chalee, Laong, and Panuwat