Ariana Rockefeller – $2.8 billion
Ariana Rockefeller might ring a bell since they are one of the most historically significant families in the United States. She is a fashion designer, amateur show jumper and great-granddaughter of John D. Rockefeller, founder of Standard Oil, and was born on May 26, 1982. This 38-year-old, like everyone in her family, is not only a philanthropist, but is also a college graduate. Well, not online colleges, but a graduate of Columbia University. Oh yes, she took fashion courses, as well, and she’s a sought-after fashion designer.