Geoffrey G. Butler is the uncle and mentor of a man who was a prominent what?
Rab Butler Richard Austen Butler, Baron Butler of Saffron Walden, (9 December 1902 – 8 March 1982), generally known as R. A. Butler and familiarly known from his initials as Rab, was a prominent British Conservative politician. "The Times" obituary called him "the creator of the modern educational system, the key-figure in the revival of post-war Conservatism, arguably the most successful chancellor since the war and unquestionably a Home Secretary of reforming zeal." He was one of his party's leaders in promoting the Post-war consensus through which the major parties largely agreed on the main points of domestic policy until the 1970s, sometimes known as "Butskellism" from an elision of his name with that of his Labour counterpart Hugh Gaitskell.
Alfred Gwynne Vanderbilt II Alfred Gwynne Vanderbilt Jr. (September 22, 1912 – November 12, 1999) was a member of the prominent Vanderbilt family, a son of the first Alfred Gwynne Vanderbilt, who died a hero in the sinking of the RMS "Lusitania". His mother, Margaret Emerson (daughter of the Bromo-Seltzer inventor Isaac E Emerson), was one of America's wealthiest women and most sought-after hostesses, operating at least seven large estates around the country. His grandfather, Cornelius Vanderbilt II, had been one of America's most revered businessman; his great-grandfather, William Henry Vanderbilt had been the richest man in the world. "Commodore" Cornelius Vanderbilt started the family fortune in shipping and railroads as the founder of the New York Central Railroad and builder of Grand Central Terminal in New York.