Kathleen Kennedy (1920 - 1948), Marchioness of Hartington, was the daughter of the former bootlegger and ambassadorJoseph 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.
... the town had a total population of 17,006.
Geography
Holtsville is located at 40°48'48" North, 73°2'50" West (40.813394, -73.047175)1.
According to the United ...