Surname Promjiam (Promjiam 
) , throughout the world, is a rare cognomen. The cognomen Promjiam is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, Promjiam is the forename as well as the last name.
Saipen, Preeyaporn, Papangkorn, Chuleeporn, Nattaporn, Juthamanee, Pornlapas, Kanokporn, Suphaporn, Thamatorn, Phenchan, Kanokwan, Chulerporn, Supaporn, Jirapat, Phalita, Paopong, Paspong, Kanjana, Attapon, Somphon, Suwicha, Supawat, Surapol, Phongsapat, and Thanatchaporn