The mid-twentieth century saw the growth of privately held commercial shipping enterprises, driven by entrepreneurs who accumulated fleets and pursued business dealings across national boundaries. Aristotle Socrates Onassis, born in İzmir in 1906, was one such figure, working as a ship-owner, entrepreneur, and businessperson during this period.

Educated at the Evangelical School of Smyrna, Onassis held both Greek and Argentine citizenship, a dual national status that marked the cross-border character of his commercial life. He used English and Modern Greek in the course of his activities. His work as a ship-owner placed him among those who shaped privately controlled maritime commerce during the middle decades of the twentieth century, operating under the identity of both a Greek national and an Argentine citizen.

Onassis died in 1975, with records placing his death in the vicinity of Paris. The Library of Congress Name Authority File catalogues him under the authorized form Onassis, Aristotle Socrates, 1906–1975, a designation that has anchored his name in bibliographic and reference systems used by researchers and institutions. That formal recognition in major cataloguing authorities reflects the degree to which his life and activities became subjects of documentary and scholarly attention following his death.