 Percy Rockefeller, a financier and industrialist, was the son of Standard Oil co-founder William Avery Rockefeller Jr. (1841–1922) and his wife, Almira Geraldine Rockefeller.He was also a nephew of Standard Oil co-founder John Davison Rockefeller.Isabel Stillman was the daughter of James Jewett Stillman (1850-1918), a banker, and Sarah Elizabeth Rumrill.