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Surname Kayo (Kayo , Kajo , カヨ ) , around the globe, is a common cognomen. The last name Kayo is habitual in Japan, where it is quite a common surname, Albania, and Cameroon, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Japan, Indonesia, and Cameroon. Likewise, Kayo is the forename as well as the last name.