Sister-wife of Njörðr in the context of "Njörðr"

In Norse mythology, Freyja (Old Norse "(the) Lady") is a goddess associated with love, beauty, fertility, sex, war, gold, and seiðr (magic for seeing and influencing the future). Freyja is the owner of the necklace Brísingamen, rides a chariot pulled by two cats, is accompanied by the boar Hildisvíni, and possesses a cloak of falcon feathers to allow her to shift into falcon hamr. By her husband Óðr, she is the mother of two daughters, Hnoss and Gersemi. Along with her twin brother Freyr, her father Njörðr, and her mother (Njörðr's sister, unnamed in sources), she is a member of the Vanir. Stemming from Old Norse Freyja, modern forms of the name include Freya, Freyia, and Freja.

Freyja rules over her heavenly field, Fólkvangr, where she receives half of those who die in battle. The other half go to the god Odin's hall, Valhalla. Within Fólkvangr lies her hall, Sessrúmnir. Freyja assists other deities by allowing them to use her feathered cloak, is invoked in matters of fertility and love, and is frequently sought after by powerful jötnar who wish to make her their wife. Freyja's husband, the god Óðr, is frequently absent. She cries tears of red gold for him, and searches for him under assumed names. Freyja has numerous names, including Gefn, Hörn, Mardöll, Sýr, Vanadís, and Valfreyja.

In Norse mythology, Freyr (Old Norse: "(the) Lord") is the god associated with kingship, fertility, peace, prosperity, fair weather, and good harvest. Freyr, sometimes referred to as Yngvi-Freyr, was especially associated with Sweden and seen as an ancestor of the Swedish royal house. According to Adam of Bremen, Freyr was associated with peace and pleasure, and was represented with a phallic statue in the Temple at Uppsala. According to Snorri Sturluson, Freyr was "the most renowned of the æsir", and was venerated for good harvest and peace.

In the mythological stories in the Icelandic books the Poetic Edda and the Prose Edda, Freyr is presented as one of the Vanir, the son of the god Njörðr and his sister-wife, as well as the twin brother of the goddess Freyja. The gods gave him Álfheimr, the realm of the Elves, as a teething present. He rides the shining dwarf-made boar Gullinbursti, and possesses the ship Skíðblaðnir, which always has a favorable breeze and can be folded together and carried in a pouch when it is not being used. Freyr is also known to have been associated with the horse cult. He also kept sacred horses in his sanctuary at Trondheim in Norway. He has the servants Skírnir, Byggvir and Beyla.