Family name Reangchai (Reangchai 
) , around the globe, is an extremely rare last name. The surname Reangchai is characteristic of South-eastern Asia, particularly Cambodia, where it is a very rare surname, and Thailand, where it is an extremely rare surname. More frequently, Reangchai is the forename as well as the last name.
Udom, Butda, Kimpan, Ritrak, Saeliew, Damsuwan, Kongsong, Keawchad, Dangbumrung, Dumsuwan, Pornbunjurdsak, Janthajang, Suvakantakul, Boonyakiat, and Piyasathien