Lady Mary Howard

Lady Mary Howard was the wife of the Earl of Nottingham during the war between England and the Spanish Empire. A picture of her was shown on Diana Jones's computer screen.

Diana did much research on Merlin's bloodline, dating back to the wizard's son, Niall Oldman. When Niall decided to stay in the 21st century, Phoebe had a vision of San Francisco becoming a chaotic city beyond recognition. The Halliwell sisters then went through Diana's research and came across Mary Howard's picture. She was so similar to Niall in their looks that the sisters concluded Mary may have been the witch responsible for turning the war in England's favor. To preserve the timeline, Niall went back to his time.