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Family name Keto (Keto , كيتو , Кето ) , around the world, is a common surname. The family name Keto is habitual in Qatar, where it is quite a common surname, Finland, and Egypt, where it is quite a rare surname. In absolute terms, it most frequently occurs in Egypt, the Democratic Republic of the Congo, and Japan. Likewise, Keto is the forename as well as the last name.