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Cognomen Blaser (Blaser , Blasen ) , around the globe, is a common surname. The surname Blaser is characteristic of Western Europe, particularly Switzerland, where it is quite a common surname, Liechtenstein, and Luxembourg, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Switzerland, the United States, and Germany. Very seldom, Blaser is the forename as well as the last name.