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Last name Дайон (Dayon , Dajon , Daion ) , in the entire world, is quite a common cognomen. The surname Дайон is characteristic of Philippines, where it is quite a rare surname, France, and United Arab Emirates, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Philippines, France, and Japan. Very seldom, Дайон is the forename as well as the last name.