Lady Mary Margaret Elizabeth Petty-FitzMaurice (1910-2003) (1910–2003) Parents Lord Charles Petty-Fitzmaurice Violet Astor, Baroness Astor of Hever Children David Foulk Myddelton Hugh Robert Myddelton Fiona Violet Myddelton Siblings George Petty-Fitzmaurice, 8th Marquess of Lansdowne Gavin Astor, 2nd Baron Astor of Hever John Astor Hugh Astor Partners Ririd Myddelton