Arianrhod (ah-ree-AHN-rhohd), Arian meaning 'silver', and Rhod meaning 'wheel' or 'disc'. Celtic Moon-Mother Goddess. Called the Silver Wheel that Descends into the Sea. Daughter of the Mother Goddess Don and her consort Beli. She is ruler of Caer Sidi, a magical realm in the north. She was worshiped as priestess of the moon.