Surname ราชศิริ (Rachasiri 
, Ratchasiri , ราชศิริ ) , in all the world, is a very rare cognomen. The family name ราชศิริ is characteristic of Thailand, where it is a rare surname, and India, where it is an extremely rare surname. Likewise, ราชศิริ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ratchasiri, Rachasiri, ราชศิริ | Thailand |
| Rachsiri | Thailand, India |