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Last name Crasse (Cras , Crasse ) , across the world, is quite a rare surname. The last name Crasse is habitual in Guernsey, where it is quite a common surname, Luxembourg, where it is quite a rare surname, and Belgium. Not in comparison with a country's population, it is commonest in Western Europe, particularly France, Belgium, and Netherlands. Much less frequently, Crasse is the forename as well as the last name.