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Cognomen ליבר (Liber , Lever , Lieber ) , around the globe, is a common surname. The last name ליבר is characteristic of Israel, where it is quite a common surname, Croatia, and Slovenia, where it is quite a rare surname. In absolute terms, it is the most numerous in the United States, the United Kingdom, and Germany. Much less frequently, ליבר is the forename as well as the last name.