Family name เธียรประณีต (เธียรประณีต 
) , throughout the world, is a very rare surname. The cognomen เธียรประณีต is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เธียรประณีต is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เธียรประณีต | Thailand |