Last name Sawangjai (Sawangjai 
) , in the world, is a rare surname. The family name Sawangjai is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Sawangjai is the forename as well as the last name.
Sak, Panomchai, Panchalee, Kanokporn, Chayatorn, Sutthidar, Sirikamon, Samerphong, Ekkaphat, Pimkhwan, Pilaipan, Patraporn, Waralee, Wararee, Wanatra, Wanattra, Nongnut, Tanatid, Jutamat, Chalong, Apichai, Sasilee, Wasana, Payoom, Aumporn, Sutida, Sirima, Sumet, Thanathit, and Chanoknart