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Cognomen Boser (Boser , بوسير ) , around the globe, is quite a rare last name. The last name Boser is habitual in Liechtenstein, where it is quite a rare surname, Switzerland, and Canada, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in the United States, Germany, and Canada. Very seldom, Boser is the forename as well as the last name.