Patricia Knox

Patricia Edwina Victoria Knatchbull, 2nd Countess Mountbatten of Burma, Baroness Brabourne (née Mountbatten; 14 February 1924 – 13 June 2017), was a British peeress and third cousin of Queen Elizabeth II. She was the elder daughter of Admiral of the Fleet the 1st Earl Mountbatten of Burma (formerly Prince Louis of Battenberg) and of heiress Edwina Ashley. She was the elder sister of Lady Pamela Hicks, the first cousin of Prince Philip, Duke of Edinburgh, and the last surviving baptismal sponsor to her first cousin once removed King Charles III. She was a great-great-granddaughter of Queen Victoria.
Lady Mountbatten succeeded her father as Countess Mountbatten of Burma when he was assassinated in 1979, as his peerages had been created with special remainder to his daughters and their heirs male. This inheritance accorded her a seat in the House of Lords, which she retained until 1999, when the House of Lords Act 1999 removed most hereditary peers from the House.

Biography fallback source: Wikipedia