In 1868 the 2nd Marquess also inherited the Earldom of Cardigan from his kinsman the 7th Earl of Cardigan, and so the Marquesses of Ailesbury now also hold the titles Earl of Cardigan (1661) and Baron Brudenell, of Stonton in the County of Leicester (1628), in the Peerage of England, as well as being Baronets of England, styled "of Deene in the County of Northampton".
On 25 February 1628 Sir Thomas Brudenell (whose family had married into the Wyvilles) was created Baron Brudenell of Stonton.