Last name Kayahan (Kayahan 
) , in all the world, is quite a common surname. The surname Kayahan is habitual in Turkey, where it is quite a rare surname, Austria, where it is a rare surname, and Netherlands. Measured by absolute frequency, the name is most common in Turkey, France, and Germany. Much less frequently, Kayahan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kayahan | Austria, Netherlands, France, Germany, Turkey |
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kayahan Turkish singer, TR (b. 1949) |
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| fahri kayahan Turkish singer-songwriter, TR (b. 1918) |
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| ahmet kayahan Turkish association football player, TR (b. 1947) |
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| kayahan sarıtaş researcher |
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| sibel kayahan researcher (ORCID 0000-0001-5124-3916) |
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| emine kayahan researcher |
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| kayahan arıkan TR |
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