Richard Walter John Montagu Douglas Scott (His Grace).
10th Duke of Buccleuch and 12th Duke of Queensberry, (born 14 February 1954), styled as Lord Eskdaill until 1973 and as Earl of Dalkeith from 1973 until 2007, is a Scottish landholder and peer. He is the Duke of Buccleuch and Queensberry, as well as Chief of Clan Scott. He is the heir male of James, Duke of Monmouth (9 April 1649 – 15 July 1685), the eldest illegitimate son of Charles II and his mistress, Lucy Walter, and more remotely in a direct male line from Alan of Dol, who came to Britain in 1066 with William the Conqueror. Scott was once Scotland's largest private landowner, owning 217,000 acres (880 km2) of Scottish land, but was surpassed by Anders Holch Povlsen who currently holds 221,000 acres (890 km2) in the country.
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Spouse: Lady Elizabeth Kerr
Children: 4
Parents: John Scott, 9th Duke of Buccleuch, Jane McNeill