His third son from his second marriage, Sir Charles Pratt, was also a prominent lawyer and politician and served as Lord Chancellor between 1766 and 1770.

[4] Lord Camden was married to Elizabeth, daughter of Nicholas Jeffreys, of The Priory, Brecknockshire, in Wales.

[6] His son, the second Marquess, represented Ludgershall, Bath and Dunwich in the House of Commons and also served as Lord Lieutenant of Brecknockshire.

His son, the third Marquess, briefly sat as a Member of Parliament for Brecon in 1866, before he succeeded his father and took his seat in the House of Lords.

The heir apparent is the present holder's son James William John Pratt, Earl of Brecknock (b.