Robert Brudenell, 6th Earl of Cardigan was an English peer and Member of Parliament.

James Brudenell, 5th Earl of Cardigan, styled The Honourable James Brudenell until 1780 and known as The Lord Brudenell between 1780 and 1790, was a British courtier and politician who sat in the House of Commons from 1754 to 1780, when he was raised to the peerage as Baron Brudenell.