William Rockefeller Jr. was an American financier and co-founder of Standard Oil
William Rockefeller may also refer to: William Rockefeller Sr., father of the Standard Oil co-founder William Goodsell Rockefeller, son of the Standard Oil co-founder SS William Rockefeller, a ship named after the Standard Oil co-founder The engineer of a commuter train that derailed in New York City, killing four, in December 2013