Cognomen Siamma (Siamma 
) , throughout the world, is a very rare surname. The last name Siamma is habitual in Cyprus, where it is quite a rare surname, Greece, where it is a rare surname, and India, where it is an extremely rare surname. Very seldom, Siamma is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siamma | India, Cyprus, Greece |