BBC: William II (c.1056 - 1100): Biography of the king called William Rufus because of his ruddy complexion, he was the second son of William the Conqueror.
The Mysterious Death of Red William: Article about the king and third son of William the Conqueror.
The Normans: William II: Outline of the reign of William II (William Rufus).
William II: Short biography of the King of England (1087–1100), called William Rufus or William the Red.