Irish myth tells that St. Patrick plucked a shamrock from Irish soil to express the meaning of the Trinity- Father, Son, and Holy Spirit. Hence the reason why the glorious Shamrock Trinity Knot pays tribute to this very Irish tale.
In Celtic mythology, the Tuatha De Danann (children of the goddess Danu) were the last race of gods to occupy and conquer the British Isles before men came and took the land away from them. The Tuatha De Danann were gifted warriors and learned in magic.
Danu of the Celtic people. The story of Danu lingers with her offspring, Tuatha De Danann, or people of the goddess Danu, who in Irish folklore are known as the fairy people who are skilled in magic. Art: Danu, Celtic Mother Goddess by Judith Shaw