Surname Seyhun (Seyhun 
, Сеыхун 
) , in all the world, is quite a rare cognomen. The family name Seyhun is habitual in Turkey, where it is quite a rare surname, Germany, where it is a very rare surname, and Canada. In absolute terms, it most frequently occurs in Turkey, the United States, and Germany. Also, Seyhun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seyhun | Germany, Azerbaijan, Canada, United States, Turkey |
| Сеыхун | Russia |
| mehmet arif seyhun (b. 1884) |
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| fuat seyhun Turkish politician, TR (b. 1917) |
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| nurullah seyhun researcher (ORCID 0000-0002-6236-7479) |
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| nadide seyhun researcher |
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| deniz seyhun |
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| selahattin seyhun football player (b. 1999) |
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| selahattin seyhun Turkish footballer, TR (b. 1999) |
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