Cognomen Tueanjai (Tueanjai 
) , throughout the world, is a very rare last name. The last name Tueanjai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more prevalently, Tueanjai is the forename as well as the last name.
Case, Kongtung, Kulawong, Panichgul, Peeraban, Dilokwong, Laosuwan, Thongsee, Nimsuwan, Yokyordee, Siriphong, Kaewkheiw, Pukdeeprom, Intranongpai, Supannapop, Chueawanit, Kaewpoolpakorn, Khongkharob, Khongthung, Prasanluangwilai, Suwannasiri, Kongbangpor, Banchawut, Chimkeaw, Archyatha, Sriyathep, Pimnu, Unjai, Boaplod, Wonpreda, Maaekian, Aiadsorn, Chaikam, Chaykla, Buanark, Kaewkla, Phothiphruek, Kueathong, Pokkrong, Pinaksorn, Phukhao, Limseng, Janklay, Wongwai, Yokphithak, Saengsri, Silakhom, Sochaiyan, Prommad, and Intarapanich