Thomas de Ros, 9th Baron de Ros English noble (1427–1464) Parents Eleanor Beauchamp Thomas de Ros, 8th Baron de Ros Children unknown daughter de Ros Isabel de Ros Edmund de Ros, 10th Baron de Ros Eleanor de Ros Siblings Edmund Beaufort, 4th Duke of Somerset Margaret Beaufort, Countess of Stafford Eleanor Beaufort Mary Beaufort Henry Beaufort, 3rd Duke of Somerset Margaret de Ros Anne Beaufort Elizabeth Beaufort Lady Joan Beaufort John Beaufort, Marquess of Dorset Thomas Beaufort Richard Ros Partners Philippa Tiptoft