Surname جانسن (Jansen 
, Janson , Janssen ) , in the world, is a widespread last name. The family name جانسن is characteristic of Netherlands, where it is a widespread surname, Curacao, and Marshall Islands, where it is a common surname (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Netherlands, Germany, and the United States. Much less frequently, جانسن is the forename as well as the last name.