Family name Phuthai (ภูไท 
, ภูทัย , Phuthai 
) , across the world, is a very rare surname. The last name Phuthai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, Phuthai is the forename as well as the last name.
Sephrpai, Srisen, Kohyut, Asipong, Promsan, Piakbut, Tonphan, Sangrutsmeephen, Klinchan, Aphibansri, Sangrusmeephen, Thummanoonvit, and Hemathulintra