Eva Maria Bucher-Haefner

Eva Maria Bucher-Haefner inherited half her father Walter's stake in IT management provider Computer Associates after his death at 101 in June 2012. To that point he had been the world's oldest billionaire. She also inherited part of car dealer AMAG, which seeks brands including Volkswagen, Audi, Bentley, and Porsche. Bucher-Haefner also runs Moyglare, a 450-acre horse farm in Ireland that was also once her father's. Her brother, Martin Haefner, is also a billionaire.