Grandfather of Athina Onassis Roussel.
After her divorce from Onassis, Athina married John Spencer-Churchill. After their divorce, she married her sister's widower - Onassis's arch shipping rival - Stavros Niarchos. She was the daughter of another Greek shipping magnate, Stavros Livanos.
Children: Alexander Socrates (April 30, 1948 - January 23, 1973) and Christina Onassis.
Ended his affair with opera diva Maria Callas to marry Jacqueline Kennedy.
Founder (1956) of Olympic Airways of Greece.
In 1954, the FBI investigated Onassis for Fraud Against the Government. He was charged with violating the citizenship provision of the shipping laws which requires that all ships displaying the American flag be owned by United States citizens. Onassis pled guilty and paid $7 million to the United States Government.
According to "Greek Fire: The Story Of Maria Callas and Aristotle Onassis" by Nicholas Gage, Callas's and Onassis's child, a boy, was born and died on 30 March 1960.
Portrayed by Frank Vincent, Raul Julia, Joss Ackland, Thom Christopher, Robert Lindsay, and Philip Baker Hall. Anthony Quinn played a character based on Onassis in The Greek Tycoon (1978).
Partnered with Arthur G. Cohen to build Olympic Tower (1971), 51-story a residential/commercial building across from St. Patrick's Cathedral (New York City).
Hergé's Tintin book "Flight 714" depicts a tycoon named Laszlo Carreidas. In one scene, Carreidas is talking on the phone to an associate in New York who is attending an auction. When Carreidas hears that Onassis is trying to buy some paintings, he instantly orders the associate to buy the paintings, no matter the cost.