Cognomen เธียรไท (Thanthai 
, เธียรไท ) , around the world, is a very rare surname. The last name เธียรไท is characteristic of Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. More prevalently, เธียรไท is the forename as well as the last name.
นัยเนตร, หัตถกี, and สุวรรณเสวตร