White Lady of Gondolin

Aredhel the daughter of Fingolfin had been known as the White Lady (or, in Elvish, Ar-Feiniel) even in the days when she dwelt in Valinor. The name came from her pale complexion, and also from her habit of dressing in silver and white. When the Noldor followed Aredhel's half-uncle Fëanor into exile, she remained with her brother Turgon, the builder of the Hidden City of Gondolin. After its completion, Aredhel removed there with him, and was afterwards known as the White Lady of Gondolin.