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Surname Keon (Keon , Кеон , كيون ) , across the world, is quite a rare family name. The surname Keon is habitual in Malaysia, where it is quite a rare surname, Ireland, and the Democratic Republic of the Congo, where it is a rare surname. Measured by absolute frequency, it is commonest in Malaysia, the Democratic Republic of the Congo, and the United States. Likewise, Keon is the forename as well as the last name.