Family name Niamsuwan (Niamsuwan 
) , in the world, is a rare surname. The cognomen Niamsuwan is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
Sanee, Woraruk, Supattra, Supasuta, Arinchai, Arthithep, Akkrapon, Phitsini, Taksaporn, Natthida, Norrapat, Noppasin, Wantanee, Saruttaya, Chaiyarin, Kittipong, Potchanan, Phuttipat, Wichian, Thanaphat, Nuttika, Tiansurat, Karun, Jaran, Sathit, Somsak, Penjan, Jantib, Niyada, Matsaya, Sirirot, Siranphat, Sudarat, Bamphen, Pattiya, Pawinee, Piyanat, Piyadar, Rachata, Naphada, and Patcharawadee