Janet Beaton, Lady of Branxholme and Buccleugh (1519–1569) was an aristocratic Scottish woman and a mistress of James Hepburn, Earl of Bothwell.She had a total of five husbands. One of her nieces was Mary Beaton, one of the four ladies-in-waiting of Mary, Queen of Scots, known in history as the four Marys. In her lifetime, she was accused of having been a witch. Janet was immortalised as Sir Walter Scott's Wizard Lady of Branxholm in his celebrated narrative poem "Lay of the Last Minstrel".