The Kelpie of Loch - The Kelpie is a supernatural water horse from Celtic folklore. They tend to be malevolent in nature. They are able to transform (usually into beautiful women) and lure victims into the water to drown them.
Irish Legends - birdsofrhiannon: Eithlinn in the tower by P. Lynch In Irish mythology, Ethniu (or Eithne) is the daughter of the Fomorian leader Balor, and the mother of Lugh. [The Names upon the Harp - Eithlinn - PJ Lynch]
Trees crop in every kind of folk tale and myth.Trees in Celtic Mythology: Trees were hugely significant to the ancient Celts. They believed different kinds of trees served different mystical purposes that helped them through their lives.