Rindr is a female character in Norse mythology, described as a Jotun, a goddess or princess from the east. She was impregnated by Odin and bore him a son.
In Baldr's Draumar and Snorre's Edda, she is the giant who gives birth to Odin's son Vali, who salys the blind god Hodr for killing Baldr. In verse 11 it says that "Rind gives birth to Vali in Vestersale", which meant Jotunheimen, where the giants were living.
Another source mentioning Rindr is the Gesta Danorum, Book 3. Here she is named Rinda, daughter of the king of Rus. After Baldr's death, Odin asked the seers for advice on how to take revenge.
On their advice, Odin came to the Rus in the disguise of a warrior named Roster. Rind twice refused him. Then he turned himself into a seeress named Veha.
When Rindr seemed to fall ill, Odin came to her and told her he had a cure, warning her that it would make her violently ill. On Odin's advice, the king told him to tie Rind to a bed, whereupon Odin went to rape Rind. From this rape came Boi (Vali) who avenged Baldr.
Rindr's seduction by Odin is also described in the 3rd stanza Sigurðarkviða by Cormac Egmundarson - a song of praise to Sigurðr Hlaðajarl, the ruler of Trondheim in the middle of the 10th century.
The stanza says "Óðinn seið til Rindar", indicating a magical way of seducing Rindr. This shows that Cormac considered magic called Seidr to be an integral part of Odin.