Question: What sibling of John D. Rockefeller III was the chairman of Chase Manhattan Corporation?

Context:
Rockefeller Brothers Fund
The Rockefeller Brothers Fund (RBF) is a philanthropic foundation created and run by members of the Rockefeller family.
 It was founded in New York City in 1940 as the primary philanthropic vehicle for the five third-generation Rockefeller brothers: John D. Rockefeller III, Nelson, Laurance, Winthrop and David.
 It is distinct from the Rockefeller Foundation.
 The Rockefellers are an industrial, political, and banking family that made one of the world's largest fortunes in the oil business during the late 19th and early 20th centuries.
William B. Harrison Jr.
William B. Harrison Jr., born August 12, 1943, in Rocky Mount, North Carolina, is the former CEO and chairman of JPMorgan Chase.
 He attended high school at Virginia Episcopal School, where he was a basketball star.
 He attended the University of North Carolina at Chapel Hill, where he was admitted to the Zeta Psi fraternity.
 Having risen through the ranks of Chemical Bank before succeeding Walter V. Shipley during the Chemical Bank takeover of the Chase Manhattan Corporation, he and Douglas A. Warner III, then CEO of J.P. Morgan & Co., were the principal architects of the US$30.9 billion Chase and J.P. Morgan & Co. merger of 2000.
 Harrison has been a director of the Firm or a predecessor institution since 1991.
 Harrison is also a director of Merck & Co., Inc.
Chase Bank
JPMorgan Chase Bank, N.A., doing business as Chase Bank, is a national bank that constitutes the consumer and commercial banking subsidiary of the U.S. multinational banking and financial services holding company, JPMorgan Chase.
 The bank was known as Chase Manhattan Bank until it merged with J.P. Morgan & Co. in 2000.
 Chase Manhattan Bank was formed by the merger of the Chase National Bank and The Manhattan Company in 1955.
 The bank has been headquartered in Columbus, Ohio since its merger with Bank One Corporation in 2004.
 The bank acquired the deposits and most assets of Washington Mutual.
Walter V. Shipley
Walter V. Shipley (born November 2, 1935) was the former Chairman and Chief Executive Officer of Chase Manhattan Bank and, before that, the company with which it merged Chemical Bank.
 Shipley was named chief executive of Chemical in 1981 and held the position through 1999 and remained at the bank as chairman through January 2000, just prior to the bank's merger with J.P. Morgan & Co..
 During his 18-year tenure, Shipley oversaw Chemical's mergers with Texas Commerce Bank in 1987, Manufacturers Hanover in 1991 and Chase Manhattan Bank in 1996.
John D. Rockefeller III
John Davison Rockefeller III (March 21, 1906 – July 10, 1978) was a philanthropist and third-generation member of the prominent Rockefeller family.
 He was the eldest son of philanthropists John D. Rockefeller Jr. and Abby Aldrich Rockefeller.
 His siblings were Abby, Nelson, Laurance, Winthrop, and David.
Alida Rockefeller Messinger
Alida Ferry Rockefeller (born 1948) is an American philanthropist.
 She is the youngest daughter of John Davison Rockefeller III (1906–1978) and Blanchette Ferry Hooker (1909–1992), and a fourth-generation member of the Rockefeller family.
 Her brother is former Senator John Davison "Jay" Rockefeller IV (born 1937).
 According to an account in "The New York Times", Alida was only five years old when her father began to teach her about philanthropy.
 She said:
JPMorgan Chase
JPMorgan Chase & Co. is a U.S. multinational banking and financial services holding company headquartered in New York City.
 It is the largest bank in the United States, the world's sixth largest bank by total assets, with total assets of US$2.5 trillion, and the world's second most valuable bank by market capitalization, after ICBC.
 It is a major provider of financial services, and according to "Forbes" magazine is the world's sixth largest public company based upon a composite ranking.
 The hedge fund unit of JPMorgan Chase is the second largest hedge fund in the United States.
 The company was formed in 2000, when Chase Manhattan Corporation merged with J.P. Morgan & Co.
Hope Aldrich Rockefeller
Hope Aldrich Rockefeller (born May 17, 1938) is an American newspaper publisher.
 She is the eldest daughter of philanthropist John Davison Rockefeller III (1906–1978) and Blanchette Ferry Hooker (1909–1992).
 Her elder brother is former Senator John Davison "Jay" Rockefeller IV (born 1937).
Rockefeller family
The Rockefeller family ( ) is an American industrial, political, and banking family that made one of the world's largest fortunes in the oil business during the late 19th and early 20th centuries, with John D. Rockefeller and his brother William Rockefeller primarily through Standard Oil.
 The family is also known for its long association with and control of Chase Manhattan Bank.
 They are considered to be one of the most powerful families, if not the most powerful family, in the history of the United States.
David Rockefeller
David Rockefeller (June 12, 1915 – March 20, 2017) was an American banker who was chairman and chief executive of Chase Manhattan Corporation.
 He was the oldest living member of the Rockefeller family and family patriarch from August 2004 until his death in March 2017.
 Rockefeller was a son of John D. Rockefeller Jr. and Abby Aldrich Rockefeller, and a grandson of John D. Rockefeller and Laura Spelman Rockefeller.

Answer: David Rockefeller