Caroline Graham, Duchess of Montrose Caroline Graham, Duchess of Montrose Caroline Graham, Duchess of Montrose (10 August 1770 – 24 March 1847), formerly Lady Caroline Maria Montagu, was the second wife of James Graham, 3rd Duke of Montrose. She was the daughter of George Montagu, 4th Duke of Manchester, and his wife, the former Elizabeth Dashwood. She married Montrose on 24 July 1790, at Kensington Palace. He was fifteen years her senior, and had previously been married to Lady Jemima Elizabeth, daughter of John Ashburnham, 2nd Earl of Ashburnham; their only child had died in infancy. The duke and duchess had six children: The duke,
Prince Adolphus, Duke of Cambridge of Prince Frederick of Hesse. From 1816 to 1837, the Duke of Cambridge served as viceroy of the Kingdom of Hanover on behalf of his elder brothers, George IV and later William IV. When his niece succeeded to the British throne on 20 June 1837 as Queen Victoria, the 122-year union of the crowns the United Kingdom and Hanover ended, due to Hanover being under Salic Law. The Duke of Cumberland became King of Hanover and the Duke of Cambridge returned to Britain. The Duke of Cambridge died on 8 July 1850 at Cambridge House, Piccadilly, London, and was buried