Surname ヨンセン (Johnsen 
, ヨンセン) , in the entire world, is a common cognomen. The last name ヨンセン is characteristic of Norway, where it is a common surname, Greenland, where it is quite a common surname, and Denmark (explore the name in all countries). Measured by absolute frequency, it is commonest in Norway, the United States, and Denmark. Much less frequently, ヨンセン is the forename as well as the last name.