William Avery Rockefeller, Jr. (May 31, 1841-June 24, 1922), American financier, was a co-founder with his older brother John D. Rockefeller of the prominent United States Rockefeller family. William Avery Rockefeller, Jr. was the son of William Avery Rockefeller, Sr. and Eliza (Davison) Rockefeller.
William was born in Richford, New York and in 1853 his family moved to Strongsville, Ohio. He was to later build an ostentatious mansion called Rockwood Hall, which is near the Rockefeller family estate of Pocantico, in Westchester County New York.
In 1865, he entered the oil business by starting a refinery. In 1867, his brother's partnership of Rockefeller & Andrews, absorbed this refinery, and in 1870, the company became Standard Oil
William Rockefeller served as the company's New York representative until 1911 when Standard Oil of New Jersey was dissolved by the United States Supreme Court. He also had interests in copper, railways, and public utilities. Married to Almira Geraldine Goodsell, he built up the National City Bank of New York, now part of Citigroup. His son William Goodsell Rockefeller and Elsie Stillman, daughter of National City Bank president James Stillman, were the parents of James Stillman Rockefeller.
He died in 1922 in Tarrytown, New York and was interred in the Sleepy Hollow Cemetery, Sleepy Hollow, New York. His total descendants number at least 500.We are currently offering the following pieces signed by William Rockefeller: