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Last name Adedoyin (Adedoyin ) , around the world, is a common cognomen. The last name Adedoyin is characteristic of Nigeria, where it is quite a common surname, Niger, where it is quite a rare surname, and Ireland, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Nigeria, Niger, and the United States. Also, Adedoyin is the forename as well as the last name.