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Kathleen Kennedy

Kathleen Kennedy (1920 - 1948), Marchioness of Hartington, was the daughter of the former bootlegger and ambassador Joseph P. Kennedy, Sr.[?] and, thus, the sister of the U.S. president John F. Kennedy. She married William Cavendish (1917-1944), Marquess of Hartington and son of the 10th Duke of Devonshire, who was killed in action in World War II. She died in an airplane crash four years later.

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