Family name Promjak (Promjak 
) , in the entire world, is a rare surname. The family name Promjak is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, Promjak is the forename as well as the last name.
Piti, Preedeesak, Pataravarin, Chatchanat, Kittipong, Keeratiya, Chuleewan, Chutikarn, Chaitawat, Danaisak, Panisara, Kridsada, Kamolwan, Supatcharee, Supakorn, Nantaka, Krisada, Korawan, Chansom, Sirirat, Sarawut, Sanguan, Nakorn, Somjit, Sukson, Wilai, Suwat, Saisunee, and Patcharawan