Henry Scott, 3rd Duke of Buccleuch and 5th Duke of Queensberry KG FRSE (2 September 174611 January 1812) was a Scottish nobleman and long-time friend of Sir Walter Scott. He is the paternal 3rd great-grandfather of Princess Alice, Duchess of Gloucester, and the maternal 4th great-grandfather of Prince William of Gloucester and Prince Richard, Duke of Gloucester. Much of the family's lands and wealth were accumulated during Henry's tenure as duke. He integrated the surnames "Montagu" and "Douglas" with the Scott family name to form the unhyphenated compound surname "Montagu Douglas Scott". Early life Henry Scott was the fourth child of five born to Francis Scott, Earl of Dalkeith (son of Francis Scott, 2nd Duke of Buccleuch), and his wife, Caroline Campbell, and the third-born and only surviving male heir. He was baptised on 29 September 1746 at St. George's Church, St George Street, Hanover Square, London, England. His father, Francis Scott, died of smallpox at the age of 29, just one year before the death of Henry's grandfather, the 2nd Duke of Buccleuch. It was young Henry who succeeded his grandfather as Duke of Buccleuch on 22 April 1751, at the age of four. Educated at Eton College, through his stepfather Charles Townshend, Henry was given the opportunity to travel abroad with Adam Smith as his tutor from 1764 to 1766. The Duke remained lifelong friends with Smith and is credited with bringing him out of his shell. Marriage and family On 2 May 1767, he married Lady Elizabeth Montagu, the eldest daughter of Lady Mary Montagu and George (Brudenell) Montagu, 1st Duke of Montagu. The couple were married in Montagu House, Whitehall, London. Elizabeth's maternal and paternal grandparents were, respectively, Sir John Montagu, 2nd Duke of Montagu and Lady Mary Churchill, and George Brudenell, 3rd Earl of Cardigan and Lady Elizabeth Bruce. Two of her maternal great-grandparents were John Churchill, 1st Duke of Marlborough and Lady Sarah Jenyns (later Churchill). Henry and Elizabeth had seven children together: George Scott, Earl of Dalkeith (25 March 176829 May 1768) Lady Mary Scott (21 May 176921 April 1823), married James Stopford, 3rd Earl of Courtown, and had issue. Lady Elizabeth Scott (10 October 1770 - 29 June 1837), married Alexander Home, 10th Earl of Home and had issue. Sir Charles William Henry Montagu Scott, 4th Duke of Buccleuch & 6th Duke of Queensberry (24 May 177220 April 1819) Lady Caroline Scott