Cognomen Cysin (Cysin 
, Цысин 
) , in the entire world, is a very rare family name. The cognomen Cysin is habitual in Eastern Europe, particularly Russia, where it is a very rare surname. Also, Cysin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cysin | China |
| Цысин | Russia |