Leo Louis Martello was an American Wiccan priest, gay rights activist, and author. He was a founding member of the Strega Tradition, a form of the modern Pagan new religious movement of Wicca which drew upon his own Italian heritage. He also founded the Witches' Anti-Defamation League, later known as the Witches' Anti-Discrimination Lobby. He published a number of books on subjects such as Wicca, astrology, and tarot reading.