Cognomen Thongngok (Thongngok 
) , worldwide, is a rare family name. The family name Thongngok is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
Sumet, Thanyanan, Thanaparn, Juthamard, Phongphat, Phiromrat, Benjaporn, Chompunut, Chitsupang, Wiranchana, Ekkaphon, Boonprasert, Narathip, Kunyaluck, Ketnarin, Mattawan, Nutsara, Nittaya, Wirul, Wirut, Tharn, Anong, Suwit, Thakiatkamol, and Putcharaporn