Mary Fitzwilliam Peerage person ID=575679 (1510–1558) Parents Mildred Sackville William Fitzwilliam Children John Shelley Elizabeth Shelley Mary Shelley Bridget Shelley Siblings Thomas FitzWilliam Christopher FitzWilliam Francis FitzWilliam Ellen FitzWilliam Anne FitzWilliam Sir William FitzWilliam Richard FitzWilliam Elizabeth FitzWilliam Partners Sir John Shelley