This is a name in the J.R.R. Tolkien series, Lord of the Rings. Sauron was the Villain in the LOTR's and he caused great evil to come about. he was formally the Luitenent to Melkor the Enemy, and is a half-god.
Also Sauron was a character in X-men and he was Pteradactol man mutant. He was a great mutant that could somewhat take mutant's powers.