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.
Richard Butler (Australian politician) Sir Richard Butler (3 December 1850 – 28 April 1925) was an Australian politician. He was a member of the South Australian House of Assembly from 1890 to 1924, representing Yatala (1890-1902) and Barossa (1902-1924). He served as Premier of South Australia from March to July 1905 and Leader of the Opposition from 1905 to 1909. Butler would also variously serve as Speaker of the House of Assembly (1921-1924), and as a minister under Premiers Charles Kingston, John Jenkins and Archibald Peake. His son, Richard Layton Butler, went on to serve as Premier from 1927 to 1930 and 1933 to 1938.