John Davison Rockefeller Jr. was an American financier and philanthropist who was a prominent member of the Rockefeller family. He was the only son among the five children of Standard Oil co-founder John D. Rockefeller and the father of the five famous Rockefeller brothers. In biographies, he is commonly referred to as "Junior" to distinguish him from his father, "Senior". His sons included Nelson Rockefeller, the 41st Vice President of The United States; Winthrop Rockefeller, governor of Arkansas; and banker David Rockefeller.
