Last name Therdthai (Therdthai 
) , worldwide, is a very rare family name. The family name Therdthai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Therdthai is the forename as well as the last name.
Jumpla, Thienthong, Purisamai, Kaewpichai, Kasempiti, Chaijareon, Chandarueang, Sornchumni, Yontraphun, Yontraphum, Tongmark, Therdthamwong, Thongtho, Therdjittoam, Pluemjai, Kongngam, Attasing, Sirijane, Silpprasith, Thailek, Phechrsoontorn, Koungchompoo, Sarapis, Thepsutin, and Songcharoen