The Norns are female beings who rule the destiny of gods and men. The tree itself has three major roots, and at the base of one of these roots live the Norns.

Numerous creatures live on Yggdrasil, such as the insulting messenger squirrel Ratatoskr and the perching hawk Veðrfölnir. Odin and his brothers Vili and Ve created the tree from the body of Ymir. The cosmology of the Nine Worlds in which all beings inhabit centers around a cosmological tree, Yggdrasil.

I remember yet the giants of yore, Who gave me bread in the days gone by Nine worlds I know, the nine in the tree, With mighty roots beneath the earth. This is still the belief system in Vikings. Once, the Germanic gods where known across Northern Europe and southern England, but at the start of the Viking Age the religion had been, often violently, replaced by Christianity, leaving the Norse tribes the last followers. The northernmost extension of Germanic mythology, Norse mythology, consists of tales of various deities, beings, heroes, and gods that are mentioned in the source texts derived from numerous sources from both before and after the pagan period, including medieval manuscripts, archaeological representations, and folk tradition. Norse mythology, or Scandinavian mythology, is the body of mythology of the North Germanic peoples stemming from Norse paganism and continuing after the Christianization of Scandinavia and into the Scandinavian folklore of the modern period. Harken to me, all holy races, Sons of Heimdall, high and low, Thou wilt, Valfather, that well I tell of old tales I remember of men long ago

The mighty vikings