Cognomen Ярл (Jarl 
, Ярл) , across the world, is quite a rare last name. The last name Ярл is habitual in Northern Europe, particularly Sweden, where it is quite a common surname, Norway, where it is quite a rare surname, and Iceland. Measured by absolute frequency, it is commonest in Sweden, the United States, and Norway. Likewise, Ярл is the forename as well as the last name.