Earl of Peterborough

He was succeeded in the barony of Mordaunt (which could be passed through female lines) by his daughter, Mary, 7th Baroness.

The Honourable John Mordaunt, second son of the first Earl of Peterborough, fought as a Royalist during the Civil War.

In 1697 Lord Monmouth also succeeded his uncle in the earldom of Peterborough.

The Honourable Henry Mordaunt (d. 1710), second son of the third Earl, was a captain in the Royal Navy.

His son Sir John Mordaunt was also a prominent soldier and politician.