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Surname Kleiven (Kleiven
) , across the world, is quite a rare family name. The cognomen Kleiven is habitual in Northern Europe, particularly Norway, where it is quite a common surname, Denmark, where it is quite a rare surname, and Sweden, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Norway, Denmark, and the United States. Much less frequently, Kleiven is the forename as well as the last name.