Aristotle Onassis and his yacht "Christina O". Onassis died at age 69 on 15 March 1975 at the American Hospital of Paris in Neuilly-sur-Seine, France, of respiratory failure, a complication of the myasthenia gravis from which he had been suffering during the last years of his life. Onassis was buried on his island of Skorpios in Greece, alongside his son, Alexander. Onassis' will established a charitable foundation in memory of his son, named the Alexander S. Onassis Public Benefit Foundation, based in the tax haven of Vaduz in Liechtenstein, and headquartered in Athens. The foundation received 45% of Onassis' estate, which would
Tina Onassis Niarchos Lausanne, Switzerland. Her daughter, Christina Onassis, sued Stavros Niarchos, her mother's widower, for her mother's estimated US$250 million (in 1974 dollars) estate claiming the marriage should be annulled under Greek law. Christina later dropped the lawsuit and Niarchos returned all of his wife's money as well as her jewelry, artwork and other personal effects to Christina. Her only living descendant is her namesake granddaughter, Athina Onassis, Christina's daughter. Tina Onassis Niarchos Athina Mary "Tina" Niarchos (, , née Livanos; 19 March 1929 – 10 October 1974) was the second daughter of the Greek shipping magnate Stavros Livanos and Arietta Zafiraki.