Surname เธียรกิจ (เธียรกิจ 
) , worldwide, is a very rare family name. The cognomen เธียรกิจ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เธียรกิจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เธียรกิจ | Thailand |