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Cognomen Kaster (Kaster , Кастер , كاستر ) , around the world, is quite a rare family name. The cognomen Kaster is habitual in Germany, where it is quite a rare surname, Denmark, and the United States, where it is a rare surname. Measured by absolute frequency, this name is the most popular in the United States, Germany, and Brazil. Very seldom, Kaster is the forename as well as the last name.