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Cognomen Ayhan (Ayhan , ايهان , Айхан ) , around the world, is a common surname. The last name Ayhan is characteristic of Turkey, where it is quite a common surname, Kyrgyzstan, where it is quite a rare surname, and Azerbaijan. In absolute terms, this name is the most popular in Turkey, Germany, and France. More frequently, Ayhan is the forename as well as the last name.