Ungoliant-The evil creature of spider-form who was Melkor's accomplice in the Darkening of Valinor, and who fled with him to Middle-earth. The creatures that infested the Ered Gorgoroth were her offspring and descendants, as was Shelob who dwelt on the borders of Mordor.
Leaflock-One of the oldest of the Ents, called Finglas in Elvish, whose name referred to his leafy 'hair'. According to Treebeard, Leaflock had become tired and tree-like, sometimes sleeping entire seasons through.