Aristotle Onassis's only granddaughter inherited half his fortune at 18, after her father and the trustees fought for years

Aristotle Onassis's son Alexander was killed in a plane crash in 1973. Onassis died two years later. His will named four trustees as executors. The Alexander S. Onassis Public Benefit Foundation, named for the dead son, took control of the shipping business and half the fortune. She died in 1988, aged 37, from an accidental overdose of diet and sleeping pills. Her only child, Athina, was three. Athina was raised in Switzerland by her father, Thierry Roussel, Christina's fourth husband. Roussel accused the foundation's Greek trustees of embezzling and mismanaging the estate and of plotting to kidnap his daughter. In 1998 the foundation brought slander charges against him in Athens, and he sued its president, Stelios Papadimitriou, for defamation. The trustees said Roussel wanted control of the $600 million inheritance before Athina came of age. Auditors from KPMG Fides oversaw the estate from 1999. In January 2003, at 18, Athina inherited her half, estimated at $700 million to $1 billion, including the island of Skorpios. The foundation's board signalled it might oppose her becoming its president at 21. In April 2013 Skorpios went to a trust for Ekaterina Rybolovleva, daughter of a Russian billionaire. Greek media put the price above $100 million.