Cognomen Sismas (Sismas 
) , throughout the world, is a very rare family name. The surname Sismas is habitual in Romania, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Sismas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sismas | Romania, United States, India |