Cognomen Ketngam (Ketngam 
) , all around the world, is a rare surname. The cognomen Ketngam is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Ketngam is the forename as well as the last name.
Kyia, Thitoudone, Netnapa, Orathay, Wassana, Sawitree, Suphavit, Chalocha, Chonsiri, Kraisorn, Rattaket, Jiraporn, Tongtong, Moukdavanh, Sawangsri, Suphaphit, Chanasorn, Chonticha, Chotiphak, Chuenchit, Khwanchai, Phouthone, Luksiri, Jeeraporn, Phatsasi, Apichit, Araya, Buasa, Patin, Ricky, Valis, Vixay, Wasan, Wilai, Sumran, Apiwat, Panisa, Porama, Nutcha, Usamas, Michael, Saranya, Sarapon, Sasiton, Sirilak, Sukanya, Somphol, Panarat, and Sirapatsorn