Family name Yuanchai (Yuanchai 
) , globally, is an extremely rare surname. The family name Yuanchai is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, Yuanchai is the forename as well as the last name.
Li, Zheng, Ngasit, Sunnuwong, Kongnakorn, Phansaengsu, Choopromkaew, and Xoumphonphakdy