An ogress lives to the east of Midgard in the forest called Jarnvid [Iron Wood]. The troll women who are called the Jarnvidjur [the Iron Wood Dwellers] live in that forest. The old ogress bore many giant sons, all in the likeness of wolves, and it is from here that these wolves come. It is said that the most powerful of this kin will be the one called Managarm [Moon Dog]. He will gorge himself with the life blood of all who die, and he will swallow the moon, spattering blood throughout the sky and all the heavens. (Byock 20)