John D. Rockefeller has a sibling.
John D. Rockefeller . After buying them out , he and his brother William founded Rockefeller & Andrews with Samuel Andrews . Rockefeller formally founded the Standard Oil Company , Inc. in 1870 as an Ohio partnership with his brother , Henry Flagler , Jabez A. Bostwick , Samuel Andrews , and a silent partner , Stephen V. Harkness .