John D. Rockefeller Jr.
Entrepreneur
Philanthropist, Standard Oil director, and pivotal member of the Rockefeller family.
He graduated from Brown University in 1897.
He became one of New York City's largest real-estate holders after developing and financing Rockefeller Center during the Great Depression.
He married Abby Greene Aldrich in 1901, which was a major social event in the Gilded Age. He fathered Nelson Rockefeller. He was his father's only son.
He became director of J.P. Morgan's newly formed U.S. Steel company.