St Peter's Churchyard, Edensor - grave of Kathleen Cavendish, Marchioness of Hartington (née Kennedy, 1920–1948), sister of U.S. President John F. Kennedy and widow of William Cavendish, Marquess of Hartington (1917–1944). Image of the ground plaque. Kathleen Cavendish's grave is marked with a headstone and a plaque in the ground commemorating the visit of U.S. President John F. Kennedy at the gravesite