List of Famous people with last name Hartington

Kathleen Agnes Cavendish, Marchioness of Hartington, also known as "Kick" Kennedy, was an American socialite. She was the daughter of Joseph P. Kennedy, Sr. and Rose Kennedy; sister of future U.S. President John F. Kennedy and Senators Robert F. Kennedy and Edward M. "Ted" Kennedy; and wife of the Marquess of Hartington, heir apparent to the 10th Duke of Devonshire.

William John Robert Cavendish, Marquess of Hartington was a British politician and British Army officer. He was the elder son of Edward Cavendish, 10th Duke of Devonshire, and therefore the heir to the dukedom. He was killed in action in the Second World War during fighting in the Low Countries in September 1944 whilst leading a company of the Coldstream Guards.