Iðunn
Iðunn is a goddess in Norse Mythology. She is the goddess of youth, wife of Bragi, god of poetry. She guards the golden apples. These apples are eaten by the Norse gods to let them live until Ragnarok (the battle of the end of the world).
Iðunn Media
Ydun (1858) by Herman Wilhelm Bissen
Bragi sitting playing the harp, Iðunn standing behind him (1846) by Nils Blommér
The logo of the first edition (1876) of the Swedish Encyclopedia Nordisk familjebok features a depiction of Iðunn