Gefjon

Norse Mythology: A prophetic virgin goddess and a member of the Aesir and Vanir. All women who die virgins go to her hall. She was also a fertility goddess. In one myth, Gylfi, king of Sweden, tells Gefjon, who was disguised as a beggar, that she could have as much of Sweden as she could plough with four oxen in one day. She traveled to Jotunheim and found her four oxen sons whom she had by a giant (she isn't a virgin in this myth!). She returned to Sweden in Midgard with her sons and ploughed all of the land now known as Zealand so it became part of Denmark, thereby tricking Gylfi. Her name means "Giver".

(Nicole Cherry, A list of Norse Beings, http://www.ugcs.caltech.edu/~cherryne)