Lady Mary Margaret Seymour (1855-1948) (1855–1948) Parents Emily Seymour, Marchioness of Hertford Francis Seymour, 5th Marquess of Hertford Children Edward John Dashwood Wilfred James Dashwood Margaret Frances Dashwood Ernest George Dashwood Dorothy Constance Dashwood Muriel Helen Dashwood Sir Robert Henry Seymour Dashwood, 7th Bt. Emily Sophia Dashwood Arthur Paul Dashwood Henry Godfrey Dashwood Lionel Albert Dashwood Siblings Lady Constance Adelaide Seymour Lord Ernest James Seymour Lady Florence Catherine Seymour Horatia Elizabeth Erskine Lord Albert Seymour Lady Georgina Emily Lucy Seymour Frederica Georgina Seymour Hugh Seymour, 6th Marquess of Hertford Lord Victor Alexander Seymour Partners Sir George John Egerton Dashwood, 6th Bt.