Cognomen Siarras (Siarras 
) , in the world, is a rare family name. The last name Siarras is habitual in Greece, where it is a rare surname, France, and the United States, where it is an extremely rare surname. Very seldom, Siarras is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siarras | France, Greece, United States |