The Frandy Tree

The Frandy Tree, an Ash at Glendevon

In the Norse mythology the Ash tree is known as the Yggdrasil and associated with the God Odin who is similar in some respects to the Celtic Gwydion. In order to obtain the Futhark Runes, Odin is said to have hung himself upon the Yggdrasil and received the Runes in his trance. As such, attuning to the World Tree in this fashion can bring gifts of blessing and inspiration.

from Druidry.org.