Athina Livanos
Athina Mary Livanos Onassis Spencer-Churchill Niarchos (19 March 1929 – 10 October 1974) was the second daughter of the Greek shipping magnate Stavros Livanos. She was best known as the first wife of Aristotle Onassis, but she later married her older sister Eugenia's widower, Stavros Niarchos. She was older sister to her parents' only son, George Stavros Livanos.
Read more about Athina Livanos: Marriages and Family, Genealogy