In
Norse mythology, the feminine
Fjörgyn (
Old Norse "earth") is described as the mother of the god
Thor, son of
Odin, and the masculine
Fjörgynn is described as the father of the goddess
Frigg, wife of Odin. Both names appear in the
Poetic Edda, compiled in the 13th century from earlier traditional sources, and the
Prose Edda, written in the 13th century by
Snorri Sturluson. A number of theories surround the names, and they have been the subject of scholarly discourse.