Family name ธีรวิทยาอาจ (ธีรวิทยาอาจ 
) , in the entire world, is a very rare surname. The cognomen ธีรวิทยาอาจ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธีรวิทยาอาจ | Thailand |