Anne Caroline Salisbury is the maternal great-grandmother of which wife of King George VI and the mother of Queen Elizabeth II and Princess Margaret, Countess of Snowdon?
Queen Elizabeth The Queen Mother Elizabeth Angela Marguerite Bowes-Lyon (4 August 1900 – 30 March 2002) was the wife of King George VI and the mother of Queen Elizabeth II and Princess Margaret, Countess of Snowdon. She was Queen of the United Kingdom and the Dominions from her husband's accession in 1936 until his death in 1952, after which she was known as Queen Elizabeth The Queen Mother, to avoid confusion with her daughter. She was the last Empress of India.
Beatrix Beauclerk, Marchioness of Waterford Beatrix Frances Beauclerk, Duchess of St Albans, Marchioness of Waterford, GBE, DGStJ (25 March 1877 – 5 August 1953), born Lady Beatrix Frances Petty-FitzMaurice, was a daughter of the 5th Marquess of Lansdowne and his wife, Maud. She was named after her maternal aunt, Beatrix Frances Lambton, Countess of Durham (born Lady Beatrix Frances Hamilton), Lady Lansdowne's favourite sister.