The traditional burial place of the Marquesses of Queensberry is the Douglas family mausoleum at Cummertrees Parish Church.

On 22 June 1893, Queen Victoria raised Francis Archibald, Viscount Drumlanrig, the heir of the 9th Marquess, to the peerage of the United Kingdom as Baron Kelhead.

Francis, Lord Drumlanrig, died without descendants the following year and the title "Baron Kelhead" became extinct.

[4] The Dukedom of Queensberry passed by special remainder to the heirs male or female of the 1st Earl of Queensberry who was Henry Scott, 3rd Duke of Buccleuch, son of Francis Scott, Earl of Dalkeith through Lady Jean Douglas (married to Francis Scott, 2nd Duke of Buccleuch) who was eldest daughter surviving infancy of the 2nd Duke of Queensberry.

The heir apparent is the present holder's son Sholto Francis Guy Douglas, Viscount Drumlanrig (born 1967).