Key Info

- Unknown sister and wife of Njörðr and mother of Freyr and Freyja

Brief Bio

In Norse mythology, Njörðr's sister-wife is unnamed, though she is generally believed to be Nerthus, a fertility goddess mentioned by the Roman writer Tacitus. She is the mother of the twins Freyr and Freyja. While Njörðr is associated with the sea, Nerthus is linked to earth and fertility. 

The situation is further complicated in that narratives describing the birth of Freyr and Freyja contradictorily cite the birth of the siblings occurring either after or before Njörðr left Vanaheimr to live among the Æsir. In addition, Freyr is referred to as the "son" of Njörðr and the goddess Skaði in the Poetic Edda poem Skírnismál.