Family name Wangsai (Wangsai 
) , globally, is a rare surname. The family name Wangsai is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Wangsai is the forename as well as the last name.
Sanga, Supakorn, Kamoltip, Peachaya, Juntarut, Naruemol, Nattanun, Surachat, Nantarika, Yupaporn, Mingkhwan, Sitthanon, Angsumalee, Pratoomtip, Tawanchai, Wannapha, Kotchapong, Siwakorn, Wassana, Sakda, Kirin, Tawin, Yanin, Adisak, Bordin, Yingyos, Siripat, Pondhathai, Pichaya, Phakjira, Jutatip, Jirapun, Thanida, Sukanya, and Phanuphong