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The wife of President John F. Kennedy, popularly known as Jackie Kennedy, and later as “Jackie O.” The public admired her as an elegant first lady whose beauty, sense of style, and interest in the arts set her apart from other first ladies. Her stoic demeanor at the time of her husband's assassination enhanced her standing with the public. In 1968, she stunned the nation by marrying Greek shipping magnate Aristotle Onassis, who was many years her senior.