The title Duke of Queensberry was created in the Peerage of Scotland on 3 February 1684 along with the subsidiary title Marquess of Dumfriesshire for the 1st Marquess of Queensberry. The Dukedom was held along with the Marquessate of Queensberry until the death of the 4th Duke in 1810, when the Marquessate was inherited by Sir Charles Douglas of Kelhead, 5th Baronet, while the Dukedom was inherited by the 3rd Duke of Buccleuch. Since then the title of Duke of Queensberry has been held by the Dukes of Buccleuch. In 1708 the 2nd Duke was created Duke of Dover in the Peerage of Great Britain, but these titles became extinct upon the death of the 2nd Duke of Dover in 1778. Several subsidiary titles are associated with the Dukedom of Queensberry, namely Marquess of Dumfriesshire, Earl of Drumlanrig and Sanquhar, Viscount of Nith, Tortholwald and Ross and Lord Douglas of Kilmount, Middlebie and Dornock . The seat of the Dukes is at Drumlanrig Castle, built by the 1st Duke of Queensberry.
Dukes of Queensberry (1684)
William Douglas, 1st Duke of Queensberry was, until February 1684, merely Marquess of Queensberry
James Douglas, 2nd Duke of Queensberry, 1st Duke of Dover, eldest son of the 1st Duke
*William Douglas, Earl of Drumlanrig, eldest son of the 2nd Duke, died in infancy
*James Douglas, 3rd Marquess of Queensberry, second son of the 2nd Duke, was an imbecile and was excluded from the succession to the dukedom only by a charter of novodamus and then died without issue
Charles Douglas, 3rd Duke of Queensberry, 2nd Duke of Dover, third son of the 2nd Duke, succeeded his father due to special remainder and died without issue
*Henry Douglas, Earl of Drumlanrig, elder son of the 3rd Duke, died without issue
*Charles Douglas, Earl of Drumlanrig, younger son of the 3rd Duke, died without issue
William Douglas, 4th Duke of Queensberry, great-grandson of the 1st Duke via the Earls of March
Henry Scott, 3rd Duke of Buccleuch, 5th Duke of Queensberry, great-grandson of the 2nd Duke of Queensberry
*George Scott, Earl of Dalkeith, eldest son of the 3rd Duke of Buccleuch, died in infancy
Charles William Henry Montagu-Scott, 4th Duke of Buccleuch, 6th Duke of Queensberry, second son of the 3rd Duke
*George Henry Scott, Lord Scott of Whitchester, eldest son of the 4th Duke, died young
