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Cognomen Smul (Smul
, Smulu) , in all the world, is a rare surname. The cognomen Smul is characteristic of Belgium, where it is quite a rare surname, Poland, where it is a rare surname, and Norway, where it is a very rare surname. In absolute terms, it most frequently occurs in Belgium, Poland, and the United States. Likewise, Smul is the forename as well as the last name.