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Cognomen Киф (Keefe , Keef , Киф ) , worldwide, is a common family name. The surname Киф is habitual in Isle of Man, where it is quite a common surname, Fiji, where it is quite a rare surname, and the United States. Not in comparison with a country's population, it is commonest in the United States, the United Kingdom, and Canada. Much less frequently, Киф is the forename as well as the last name.