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Surname Sosnowska (Sosnowska ) , across the world, is quite a rare cognomen. The surname Sosnowska is habitual in Poland, where it is quite a common surname, Belgium, where it is a rare surname, and Norway. Measured by absolute frequency, this name is the most popular in Poland, the United Kingdom, and Germany. More prevalently, Sosnowska is the forename as well as the last name.