Richard Walter John Montagu Douglas Scott, 10th Duke of Buccleuch and 12th Duke of Queensberry,, 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 a descendant of James, Duke of Monmouth, 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 arrived in Britain in 1066 with William the Conqueror.

The Most Ancient and Most Noble Order of the Thistle is an order of chivalry associated with Scotland. The current version of the order was founded in 1687 by King James VII of Scotland, who asserted that he was reviving an earlier order. The order consists of the sovereign and sixteen knights and ladies, as well as certain "extra" knights. The sovereign alone grants membership of the order; they are not advised by the government, as occurs with most other orders.