Kathleen Kennedy

Kathleen Agnes "Kick" Kennedy, Marchioness of Hartington (February 20, 1920–May 13, 1948), was the daughter of Joseph P. Kennedy, Sr and the younger sister of American President John F. Kennedy. She married William Cavendish, Marquess of Hartington and son of the 10th Duke of Devonshire, who was killed in action in World War II in 1944. She died in an airplane crash over Sainte-Bauzille, Ardeche, France and is buried in the Cavendish plot at Saint Peter's Church, Edonsor Village, Chatsworth, England.