Mary Lowther noblewoman; (1781-1862) (1781–1862) Parents William Lowther, 1st Earl of Lonsdale Augusta Fane Children George Cavendish-Bentinck Siblings William Lowther, 2nd Earl of Lonsdale Lady Elizabeth Lowther Lady Anne Lowther Lady Grace Caroline Lowther Henry Lowther Partners Frederick Cavendish-Bentinck