Surname Siriroj (ศิริโรจน์ 
, สิริโรจน์ , Siriroj 
) , in all the world, is quite a rare family name. The last name Siriroj is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname. Likewise, Siriroj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิริโรจน์, ศิริโรจน์ | Thailand |
| Siriroj | United States, Thailand |