Kennedy, Jacqueline Lee Bouvier Former name of Jacqueline Kennedy O·nas·sis  (ō-nās'ĭs, ō-nä'sĭs)  First Lady of the United States (1961-1963) as the wife of President John F. Kennedy. She promoted the arts and supervised the redecoration of the White House. Following her husband's assassination she returned to private life and in 1968 married Aristotle Onassis. |