Surname Йессен (Jessen 
, Iessen 
, Йессен) , in the entire world, is a common cognomen. The family name Йессен is characteristic of Denmark, where it is a common surname, Greenland, and Norway, where it is quite a common surname. In absolute terms, it most frequently occurs in Denmark, Germany, and the United States. Very seldom, Йессен is the forename as well as the last name.