How was Lady Diana, Princess of Wales descended from Georgiana Duchess of Devonshire?”
Diana Spencer’s father was Edward John Spencer, 8th Earl Spencer. His father was Albert Edward Robert Spencer, 7th Earl Spencer. (This is Diana’s grandfather.) His father was Charles Robert Spencer, 6th Earl Spencer. (This is Diana’s great-grandfather.) His father was Frederick Spencer, 4th* Earl Spencer. (This is Diana’s great-great-grandfather.) His father was John George Spencer, 2nd* Earl Spencer. (This is Diana’s great-great-great-grandfather.) His sister was Georgiana Spencer, who became Georgia Cavendish, Duchess of Devonshire. (This is Diana’s great-great-great-great-aunt.) So Diana was not directly descended from Georgiana, but is her great-great-great-great-niece. ________ * – The 3rd Earl Spencer was John Charles Spencer, older brother of Frederick. The 5th was John Poyntz Spencer, older brother of Charles Robert.