Scandinavian and North German patronymic meaning 'son of Hans,' ultimately from Hebrew Yohanan ('God is gracious').
Hansen is a Scandinavian patronymic surname meaning "son of Hans," where Hans is the Danish, Norwegian, and German short form of Johannes — from the Latin Johannus and ultimately the Hebrew Yohanan, "God is gracious." Patronymic surnames of this type (Hansen, Johansen, Andersen, Petersen) were the primary naming system across Scandinavia until the late 19th century, when many countries mandated fixed hereditary surnames, freezing the patronymic in place.
The name therefore carries an entire genealogical tradition within it: to be Hansen is to descend from a Hans who descended from a long line of Johns going back through Latin Christendom to ancient Hebrew. The name has been borne by a range of notable figures: Gerhard Henrik Armauer Hansen (1841–1912), the Norwegian physician who discovered the bacterium causing leprosy (still called Hansen's disease in his honor), represents the name's scientific dimension. In American culture, Hansen has appeared across domains — as a musician's surname (the pop trio Hanson), as characters in literature and film, and as a common Norwegian-American family name in the Midwest, where Scandinavian immigration left dense cultural deposits in Minnesota, Wisconsin, and the Dakotas.
As a first name, Hansen is part of the broader contemporary trend of Scandinavian surnames crossing over into given-name use — a trend driven partly by the global popularity of Scandinavian design, culture, and television drama. It sounds clean, modern, and slightly Nordic without being unpronounceable, sitting comfortably alongside first names like Larson, Leif, and Soren in the contemporary landscape of heritage-conscious naming.