Idunn is the Goddess of Rejuvenation and Renewal, her name means ‘Rejuvenating one,’ and is described as a summery maiden with golden hair who loves to tend to her gardens and is often adorned with flower blossoms bearing fruit. She is the wife of Bragi and sister to Nanna although nothing is said of her birth parents. She also has an unnamed brother which Bragi is supposed to have slain.

“Loki spake: "Be silent, Ithun! thou art, I say,Of women most lustful in love, Since thou thy washed-bright arms didst wind About thy brother's slayer."- Lokasenna.

She is the keeper of the apples of youth, which the Aesir entrust to her as these are the apples that keep them youthful. She keeps them in a wooden Eski or ash box, of which she has the only access to a can dispense or withhold these apples to any God or Goddess. Loki once tricked her and got her kidnapped by the Jotun Thiazi.

“Bragi says that after hitting an eagle (Þjazi in disguise) with a pole, Loki finds himself stuck to the bird. Loki is pulled further and further into the sky, his feet banging against stones, gravel, and trees. Loki feels that his arms might be pulled out from his shoulders. Loki shouts and begs the eagle for a truce, and the eagle responds that Loki would not be free unless he made a solemn vow to have Iðunn come outside of Asgardr with her apples. Loki accepts Þjazi's conditions and returns to his friends Odin and Hœnir. At the time Þjazi and Loki agreed on, Loki lures Iðunn out of Asgard into "a certain forest", telling her that he had discovered some apples that she would find worth keeping, and told Iðunn that she ought to bring her own apples with her so that she may compare them with the apples he has discovered. Þjazi arrives in eagle shape, snatches Iðunn, flies away with her and takes her to his home, Þrymheimr. The Æsir begin to grow grey and old at the disappearance of Idunn. The Æsir assemble at a thing where they ask one another when Iðunn had been seen last. The Æsir realize that the last time that Iðunn was seen was when she was going outside of Asgard with Loki, and so they have Loki arrested and brought to the thing. Loki is threatened with death and torture. Terrified, Loki says that if the goddess Freyja will lend him her "falcon shape" he will search for Iðunn in the land of Jötunheimr. Freyja lends the falcon shape to Loki, and with it he flies north to Jötunheimr. One day later, Loki arrives at Þjazi's home. There he finds that Þjazi is out at sea in a boat, and that Iðunn is home alone. Loki turns her into a nut, holds her in his claws, and flies away with her as fast as possible. When Þjazi arrives home he finds that Iðunn is gone. Þjazi gets "his eagle shape", and chases Loki, which causes a storm wind. The Æsir see a falcon flying with a nut, as well as the pursuing eagle, so they bring out loads of wood shavings. The falcon flies over the fortification of Asgard and drops down by the wall. The eagle, however, misses the falcon and is unable to stop. His feathers catch fire and the eagle falls within the gates of Asgard. The Æsir kill the jötunn Þjazi "and this killing is greatly renowned."- Wikipedia Excerpt.