Who was styled by the person who is the father of Lady Sarah McCorquodale?
Lady Sarah McCorquodale Lady Elizabeth Sarah Lavinia McCorquodale (née Spencer; born 19 March 1955) is the eldest daughter of John Spencer, 8th Earl Spencer, and the Hon. Frances Shand Kydd. She is the sister of Diana, Princess of Wales.
Claud Andrew Montagu Douglas Scott Brigadier Claud Andrew Montagu Douglas Scott, DSO (13 July 1906 – 24 January 1971) was the first child and only son born to Lieutenant Colonel Lord Herbert Andrew Montagu Douglas Scott and Marie Josephine Edwards. He was a grandson of Sir William Henry Walter Montagu Douglas Scott, 6th Duke of Buccleuch & 8th Duke of Queensberry and Lady Louisa Jane Hamilton, and a paternal first cousin to Lady Alice, Duchess of Gloucester, later known as Princess Alice, Duchess of Gloucester. He was a maternal first cousin once removed to Prince William of Gloucester and Prince Richard, Duke of Gloucester, a paternal great-uncle to Sarah, Duchess of York, and a maternal second great-uncle to Princesses Beatrice and Eugenie of York.