Last name Жансен (Janssen 
, Жансен 
) , all around the world, is a widespread surname. The last name Жансен is characteristic of Netherlands, where it is a common surname, Belgium, where it is quite a common surname, and Aruba (explore the name in all countries). In absolute terms, it most frequently occurs in Netherlands, Germany, and the United States. Much less frequently, Жансен is the forename as well as the last name.