Brigadier Claud Andrew Montagu Douglas Scott, DSO 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 amp 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 greatuncle to Sarah, Duchess of York, and a maternal second greatuncle to Princesses Beatrice and Eugenie of York.
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Source: Wikipedia