in Norse mythology, is a name which Odin gave himself, when he entered the service of Bangi as a servant, in order to gain admission to the cave in which the beautiful Gunlode, a giant-maiden, guarded the poetic nectar. Boelwerk came to her in the form of a snake, and changed himself into a beautiful youth, won her love, and remained three nights withher, for which she allowed him take three draughts of the nectar. He thus emptied all the vessels which contained the costly liquid, and fled.