The courtesy title used by Lord Queensberry's eldest son and heir is Viscount Drumlanrig.

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.

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