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Cognomen Gaar (Gaar , Гаар ) , all over the world, is quite a rare surname. The family name Gaar is habitual in Austria, where it is quite a rare surname, Kazakhstan, and Germany, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and India. Very seldom, Gaar is the forename as well as the last name.