Cognomen ธีรสิริโรจน์ (ธีรสิริโรจน์ 
) , around the world, is an extremely rare surname. The last name ธีรสิริโรจน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธีรสิริโรจน์ | Thailand |