<p> <br /><b>A&E BIOGRAPHY: THE ONASSIS DYNASTY PART 3 OF 3</b> <br /><br />Onassis married Athina Livanos, daughter of shipping magnate Stavros Livanos, on December 28, 1946; their son, Alexander (April 30, 1948 – January 23, 1973), and daughter Christina (December 11, 1950 – November 19, 1988), were both born in New York City. After their divorce, Athina married her late sister's widower (and Onassis's arch shipping rival) Stavros Niarchos. <br /><br />Despite the fact they were both married, Onassis and opera diva Maria Callas embarked on a notorious affair. According to Greek Fire: The Story of Maria Callas and Aristotle Onassis by Nicholas Gage, Callas gave birth to their child, a boy, who died hours later on March 30, 1960. Onassis ended his relationship with Callas to marry Jacqueline Kennedy, widow of U.S. President John F. Kennedy, on October 20, 1968. It was said that Kennedy insisted on marriage rather than an affair so as to avoid upsetting her children. <br /><br />Onassis died at age 69, on March 15, 1975 in Neuilly-sur-Seine, France, of bronchial pneumonia, a complication of the myasthenia gravis that he had been suffering from during the last years of his life. According to his will, his daughter, Christina inherited 55% of the Onassis fortune while the other 45% was used as funds for the Alexander S. Onassis Foundation. <br /><br />This 45% was the share that his son Alexander would have inherited, had he not died in 1973. However, Jackie Kennedy received her share of the estate settling for a reported $ 10,000,000 dollars ($26 million according to other sources) which was negotiated by her former brother in law Teddy Kennedy (this amount would later grow to several hundred million under the financial stewardship of her companion Maurice Tempelsman). <br /></p><p></p>