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Family name Jarl (Jarl , Iarla , Yurl ) , in all the world, is quite a rare last name. The last name Jarl is habitual in Northern Europe, particularly Sweden, where it is quite a common surname, Norway, where it is quite a rare surname, and Iceland. In absolute terms, it is the most numerous in Sweden, the United States, and Norway. Also, Jarl is the forename as well as the last name.