Charles Cornwallis, 3rd Baron Cornwallis PC was an English politician who served as First Lord of the Admiralty and Lord Lieutenant of Suffolk, in which capacity he personally served as Colonel of the Suffolk Militia Horse in 1692. He succeeded his father Charles Cornwallis, 2nd Baron Cornwallis as Baron Cornwallis in 1673. On 27 December that year, at Westminster Abbey, he married Elizabeth Fox, daughter of Sir Stephen Fox. They had four sons:Charles, 4th Baron Cornwallis William James John