Ari Onassis was a Greek shipping magnate and business mogul. He was born in 1906 and was the son of a wealthy Greek shipping family. He was known as one of the wealthiest men in the world and was married to Jacqueline Kennedy Onassis, the widow of President John F. Kennedy. Onassis was a shrewd businessman and was able to build a vast shipping empire that included oil tankers, cargo ships, and passenger liners. He was also involved in many other business ventures, including real estate, banking, and investments. Onassis died in 1975 at the age of 69.