Cognomen Єнссен (Jenssen 
, Єнссен 
) , all around the world, is quite a common last name. The surname Єнссен is habitual in Northern Europe, particularly Norway, where it is quite a common surname, Sweden, where it is quite a rare surname, and Estonia. In absolute terms, this name is the most popular in Norway, Germany, and the United States. Very seldom, Єнссен is the forename as well as the last name.