John Beaufort, Marquess of Dorset English noble (d. 1471) Parents Eleanor Beauchamp Edmund Beaufort, 2nd Duke of Somerset Children Siblings Edmund Beaufort, 4th Duke of Somerset Eleanor Beaufort Henry Beaufort, 3rd Duke of Somerset Margaret Beaufort, Countess of Stafford Mary Beaufort Margaret de Ros Anne Beaufort Elizabeth Beaufort Thomas de Ros, 9th Baron de Ros Lady Joan Beaufort Thomas Beaufort Richard Ros