24. Ariana Rockefeller
Net Worth: $2.8 billion*
Wealth Inherited From: Standard Oil
Ariana Rockefeller is a wealthy heiress of the renowned Rockefeller dynasty, which has its roots in the early 19th century when their ancestor founded Standard Oil and made a fortune. The Rockefellers have stayed affluent, but they have also been very generous.

Oil giant Standard was acquired, resulting in another significant financial gain for the affluent family. Rockefeller has a strong interest in fashion and attended Columbia University. She had a stint at the United Nations but eventually decided to launch her own fashion label, which has been a big success. Recently, she added a line of handbags to her brand.