Morgoth and Sauron by Gerwell. (Morgoth is Melkor, one of the Ainur, created by Iluvatar). Sauron was Morgoth's second in command, and took control of Morgoth's forces after Morgoth was banished to the Void.
For love of Celeborn, who would not leave Middle Earth, she did not go West at the downfall of Melkor, but crossed Ered Lindon and came into Eriador. Celeborn and Galadriel came to be regarded as the Lord and Lady of the Eldar in Eriador.