In 1708, the 2nd Duke was created Duke of Dover (along with the subsidiary titles Marquess of Beverley and Baron Ripon) in the Peerage of Great Britain, but these titles became extinct upon the death of the 2nd Duke of Dover in 1778. In 1945, King George VI offered Winston Churchill the title of Duke of Dover, which he declined.
Several subsidiary titles are associated with the Dukedom of Queensberry, namely Marquess of Dumfriesshire (1683), Earl of Drumlanrig and Sanquhar (1682), Viscount of Nith, Tortholwald and Ross (1682) and Lord Douglas of Kilmount, Middlebie and Dornock (1682) (all in the Peerage of Scotland).
The seat of the Dukes is at Drumlanrig Castle, built by the 1st Duke of Queensberry.
Dukes of Queensberry (1684)
Other titles: Marquess of Dumfriesshire, Earl of Drumlanrig and Sanquhar, Viscount of Nith, Torthorwald and Ross and Lord Douglas of Kilmount, Middlebie and Dornock (1684)
Other titles (1st to 4th Dukes): Marquess of Queensberry (1682), Earl of Queensberry (1633), Earl of Drumlanrig and Sanquhar (1682), Viscount of Drumlanrig (1628), Viscount of Nith, Torthorwald and Ross (1682), Lord Douglas of Hawick and Tibbers (1628) and Lord Douglas of Kilmount, Middlebie and Dornock (1682)
Other titles (3rd Duke): Earl of Solway, Viscount Tibbers and Lord Douglas of Lockerby, Dalveen and Thornhill (1706)
Charles Douglas, 3rd Duke of Queensberry, 2nd Duke of Dover (1698–1778), third son of the 2nd Duke, succeeded his father due to special remainder and died without issue
Charles Douglas, Earl of Drumlanrig (1726–1756), younger son of the 3rd Duke, died without issue
Other titles (4th Duke): Earl of Ruglen (1697), Earl of March (1697), Viscount of Riccartoun (1697), Viscount of Peebles (1697), Lord Hillhouse (1697), Lord Douglas of Neidpath, Lyne and Munard (1697) and Baron Douglas, of Amesbury in the county of Wiltshire (GB, 1786)
Other titles (5th Duke onwards): Duke of Buccleuch (1663), Earl of Buccleuch (1619), Earl of Doncaster, in the county of York (En 1663, restored 1743), Earl of Dalkeith (1663), Lord Scott of Buccleuch (1606), Baron Scott of Whitchester and Eskdaill (1619), Baron Scott of Tindall, in the county of Northumberland (En 1663, restored 1743) and Lord Scott of Whitchester and Eskdale (1663)
William Douglas 1637–1695 1st Duke of Queensberry, Marquess of Queensberry, Marquess of Dumfriesshire, and Earl of Drumlanrig and Sanquhar, 3rd Earl of Queensberry
Lady Catherine Douglas
James Douglas 1639–1708 1st Baronet of Kelhead
Dukedoms of Monmouth and Buccleuch (1st creation) and earldoms of Buccleuch and Doncaster forfeit, 1663
James Douglas 1662–1711 2nd Duke of Queensberry, 1st Duke of Dover and Marquess of Beverley, 2nd Marquess of Queensberry, Marquess of Dumfriesshire, and Earl of Drumlanrig and Sanquhar
James Douglas 1697–1715 3rd Marquess of Queensberry, Marquess of Dumfriesshire, and Earl of Drumlanrig and Sanquhar
Charles Douglas 1698–1778 3rd Duke of Queensberry, 2nd Duke of Dover and Marquess of Beverley, 4th Marquess of Queensberry, Marquess of Dumfriesshire, and Earl of Drumlanrig and Sanquhar, Earl of Solway
Charles Douglas 1726–1756 styled Earl of Drumlanrig
William Douglas 1724–1810 4th Duke of Queensberry, 5th Marquess of Queensberry, Marquess of Dumfriesshire, and Earl of Drumlanrig and Sanquhar, Earl of March
Henry Scott 1746–1812 3rd Duke of Buccleuch and Earl of Dalkeith, 5th Duke of Queensberry
Quarterly: 1st grandquarter for the Earldom of Doncaster: the arms of King Charles II debruised by a Baton Sinister Argent; 2nd grandquarter for the Dukedom of Argyll: quarterly, 1st and 4th: Gyronny of eight Or and Sable (Campbell); 2nd and 3rd: Argent a Lymphad sails furled Sable flags and pennons flying Gules and oars in action of the second (Lorne); 3rd grandquarter for the Dukedom of Queensberry: quarterly, 1st and 4th: Argent a Heart Gules crowned with an Imperial Crown Or on a Chief Azure three Mullets of the field (Douglas); 2nd and 3rd, Azure a Bend between six Cross Crosslets fitchée Or (Mar); the whole of this grandquarter within a Bordure Or charged with a double Tressure flory-counter-flory Gules; 4th grandquarter for the Dukedom of Montagu: quarterly, 1st: Argent three Fusils conjoined in fess Gules a Bordure Sable (Montagu); 2nd: Or an Eagle displayed Vert beaked and membered Gules (Monthermer); 3rd: Sable a Lion rampant Argent on a Canton of the last a Cross Gules (Churchill); 4th: Argent a Chevron Gules between three Caps of Maintenance their fronts turned to the sinister Azure furred Ermine (Brudenell); over the grandquarters at the fess point an Inescutcheon Or on a Bend Azure a Mullet of six points between two Crescents of the field (Scott).
Supporters
On either side a Female Figure proper habited from the waist downwards in a Kirtle Azure gathered up at the knees the arms and bosom uncovered around the shoulders a Flowing Mantle as before suspended by the exterior hand girdle and sandals Gules and her head adorned with a Plume of three Ostrich Feathers Argent
^James Douglas, 3rd Marquess of Queensberry, a homicidal maniac, was excluded from the line of succession to the Dukedoms of Queensberry and Dover when his father — the 2nd Duke of Queensberry — surrendered all of his titles except the Marquessate and its subsidiary titles back to the Crown and obtained a new grant with the same precedence for the surrendered titles that altered the succession to his second son and then the heirs male and female of the 1st Earl of Queensberry. The succession of the Marquessate continued in remainder to the heirs male of the 1st Earl of Queensberry.