It chanced one day that Freyr had gone to Hlidskjálf, and gazed over all the world; but when he looked over into the northern region, he saw on an bestate/b a house great and fair. And toward this house went a woman; b....../b of balfen/b race, Idun by name, the youngest of Ivaldi's elder children. Prose Edda. Click the image to open in full size. "Loki and Idun" (1911). Iðunn is introduced in the Prose Edda in section 26 of the Prose Edda book Gylfaginning. ...
