Last name יונסן (Johnsen 
, יונסן 
) , around the world, is a common family name. The family name יונסן is habitual in Norway, where it is a common surname, Greenland, where it is quite a common surname, and Denmark (explore the name in all countries). In absolute terms, it is commonest in Norway, the United States, and Denmark. Very seldom, יונסן is the forename as well as the last name.