(6 July 177429 April 1854), married Charles Douglas, 6th Marquess of Queensberry and had issue. Henry James Montagu Scott, 2nd Baron Montagu of Boughton (16 December 177630 October 1845) Lady Harriet Scott (1 December 178018 April 1833), married William Kerr, 6th Marquess of Lothian and had issue. The origin of the Montagu Douglas Scott surname The Montagu line When John Montagu, 2nd Duke of Montagu, died on 5 July 1749, his estate had been entailed to his daughter, Mary, who was married to George Montagu, 1st Duke of Montagu. The Montagu peerages, like most English peerages, were limited to male heirs, and became extinct with the 2nd Duke. However, within ten days after Montagu's death, Cardigan adopted the Montagu name and coat of arms for both himself and his two children, in order that the Montagu name should continue. Seventeen years later, in 1766, King George III created him Duke of Montagu and Marquess of Monthermer. The first duke of the 1766 creation died on 23 May 1790—also survived only by a daughter, Elizabeth, now Duchess of Buccleuch. Once again the Montagu peerages became extinct. Elizabeth inherited only the unentailed Montagu assets, which included Boughton House in Weekley, Northamptonshire. Like his father-in-law, Buccleuch wished to perpetuate the Montagu name, and adopted the unhyphenated surname Montagu Scott. The Douglas line William Douglas, 4th Duke of Queensberry never married; when he died on 23 December 1810, his peerages and entailments passed to his 2nd cousin once removed, Sir Henry Montagu Scott, 3rd Duke of Buccleuch, through Sir Henry's grandmother, Lady Jane Douglas, Queensberry's first cousin once removed. Buccleuch then added the surname to his own, forming the unhyphenated surname Montagu Douglas Scott which the family bears to this day. Career Buccleuch was Governor of the Royal Bank of Scotland from 1777 to 1812. He was joint founder of the Royal Society of Edinburgh and its first President, serving from 1783 until his death in 1812. He was Lord Lieutenant of Midlothian and of Haddington from 1794 to 1812. He was also appointed a deputy lieutenant of Northamptonshire on 9 May 1803. In 1778, when Britain was threatened with invasion by France and Spain during the American War of Independence, he raised a regiment of Fencibles at Dalkeith, the South Fencible Regiment or 'Southern regiment of Fencible Men' on 10 April and commanded it as Colonel until its disbandment on 1 April 1783.