Former United States citizens

Denise Rich (born Eisenberg; January 26, 1944) is an American-born Austrian singer-songwriter, socialite, philanthropist and political fundraiser.

Christina Onassis (Greek: Χριστίνα Ωνάση; 11 December 1950 – 19 November 1988) was a Greek businesswoman, socialite, and heiress to the Onassis fortune. She was the only daughter of Aristotle Onassis and Athina Mary Livanos.