Cognomen سيحان (Seyhan 
, سيحان 
) , across the world, is a common last name. The surname سيحان is habitual in Turkey, where it is quite a common surname, Bulgaria, where it is quite a rare surname, and Germany, where it is a rare surname. In absolute terms, this name is the most popular in Turkey, Germany, and France. Likewise, سيحان is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seyhan | France, Germany, Turkey, Saudi Arabia, Bulgaria |
| سيحان | Jordan, Yemen, Iran, Iraq |