Gefjon is credited with the creation of the Danish island of Zealand. When the ruler of Sweden offers her all the land she and four oxen can plow in a day and a night, she transforms her four sons into beasts of burden. Together, they uproot a swathe of earth from the mainland and deposit it into the sea, creating Zealand. This act of might earns Gefjon respect among gods.
Gefjon knows the destinies of humankind as well as Odin, the chief of all gods. Because of this, even the most powerful gods fear incurring her wrath.