In the entire world, Seyhan (Seyhan 
, سيحان 
, Сеыхан 
) is a common dominantly feminine, but infrequently male first name. The forename Seyhan is characteristic of Turkey, where it is quite a common dominantly girly, but seldom boy's name, Bulgaria, where it is quite a rare predominantly male, but scarcely feminine name, and Austria, where it is a rare female name. Measured by absolute frequency, it is the most numerous in Turkey, Bulgaria, and Saudi Arabia. Also, Seyhan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Seyhan | Germany, France, Bulgaria, Saudi Arabia, Turkey |
| سيحان | Iraq, Yemen, Jordan, Iran |
| Сеыхан | Russia |
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seyhan kurt French-Turkish sociologist, FR (b. 1971) |
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seyhan yıldız Liechtensteiner footballer, TR (b. 1989) |
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| seyhan karabay (b. 1946) |
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| seyhan erözçelik Turkish poet, TR (b. 1962) |
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| seyhan derin Turco-German screenwriter, DE (b. 1969) |
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| seyhan girginer (b. 1963) |
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| seyhan sevinç Turkish journalist, TR (b. 1977) |
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| seyhan dikci researcher (ORCID 0000-0003-2062-3515) |
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| seyhan sahan-firat researcher |
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| seyhan ordekci researcher |
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| seyhan ozdemir researcher (ORCID 0000-0002-3530-6689) |
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| seyhan salman researcher |
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| seyhan çankaya researcher |
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| seyhan demir karabulut researcher |
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| baran seyhan film producer |
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