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Cognomen Sandahl (Sandahl , סנדל , Сандаль) , globally, is quite a rare family name. The cognomen Sandahl is habitual in Northern Europe, particularly Sweden, where it is quite a common surname, Denmark, where it is quite a rare surname, and Norway. Measured by absolute frequency, it is the most numerous in Sweden, the United States, and Denmark. Much less frequently, Sandahl is the forename as well as the last name.