Eir (Old Norse "help, mercy) is a goddess and/or valkyrie associated with medical skill. Eir is attested in the Poetic Edda, compiled in the century from earlier traditional sources; the Prose Edda, written in the century by Snorri Sturluson.
FREYJA AND FREYR Originally Vanir but living with the Aesir, Freyr and Freyja are far and away the most well-known, well-loved, and powerful of any twins in Norse mythology. Involved in the exchange of leaders that formally marked the end of the war between the Vanir (fertility deities) and the Aesir (war deities), Freyr and Freyja were to become among the main deities in Norse religion, subordinate only to Thor and Odin. In addition, Freyja is the only Norse goddess of whom a significant
Brynhildr (also spelled Brunhild, Brünnhilde, Brynhild) is a shieldmaiden and a valkyrie in Germanic mythology, where she appears as a main character in the Völsunga saga and some Eddic poems treating the same events.