The first woman, Embla, was created from an elm tree. Found on a beach by the gods Odin, Vili, and Vé (or Hœnir and Lóðurr), she and the first man, Ask (formed from an ash tree), were brought to life, given form, and intelligence. Embla's name is often interpreted to mean "small elm".
The Ash tree was known as 'Yggdrasil' (the "Great World Tree").
The hazel tree is known as the 'Tree of Knowledge'.
The oak tree is associated with Norse and Finnish Thunder Gods, Thor and Jumala, as well as the Roman Jupiter and Greek Zeus.
Celtic and Norse people thought the yew tree prevented bewitching and death.