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.
John Rockefeller's funeral was attended by president Ronald Reagan. 
Ronald Reagan did not become president until 1980, after John Rockefeller died in 1978. Ronald Reagan may or may not have attended, but he was definitely not the president. 