Nyx, the goddess of the Night. A shadowy figure, Nyx stood at or near the beginning of creation, and was the mother of personified gods such as Hypnos (sleep) and Thnatos (death). Her appearances in mythology are sparse, but reveal her as a figure of exceptional power and beauty. She is found in the shadows of the world and only ever seen in glimpses.
Because of her creation of the stars, Varda was the dearest of the Valar to the elves, who called to her for aid from Middle-earth. The Valar are divine beings below a greater, more ultimate Creator, Ilúvatar. Thus some equate the Valar of Middle-earth with saints and angels; thus Varda, in her role as the most loved and prayed-to Vala, may be an equivalent of the Virgin Mary in Tolkien's own Catholic faith.