In Norse mythology, Nanna Nepsdóttir (Old Norse: [ˈnɑnːɑ ˈnepsˌdoːtːez̠]) or simply Nanna is a goddess associated with the god Baldr. Accounts of Nanna vary greatly by source. In the Prose Edda, written in the 13th century by Snorri Sturluson, Nanna is married to Baldr and the couple produced a son, the god Forseti.