Family name ศิรวงศ์เดชา (ศิรวงศ์เดชา 
) , throughout the world, is an extremely rare surname. The surname ศิรวงศ์เดชา is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ศิรวงศ์เดชา | Thailand |