Geoffrey G. Butler is the uncle and mentor of a man who was a prominent what?
Geoffrey G. Butler Sir George Geoffrey Gilbert Butler (15 August 1887 - 2 May 1929) was an English historian, academic and politician who served as a Member of Parliament for Cambridge University, 1923–1929. He was uncle of and mentor to Rab Butler, and was an early sponsor of Liddell Hart, a former student who would upon the senior Butler's death that 'I have never had a better friend, in every sense of the word’. An avid Conservative, he was a significant figure in the intellectual and political history of his party between the World Wars. In April–May 1917 he was a member of the Balfour Mission, intended to promote cooperation between the US and UK during World War I.
Claude Montefiore Claude Joseph Goldsmid Montefiore (1858 - 1938) was son of Nathaniel Montefiore, and the great-nephew of Sir Moses Montefiore. He was the intellectual founder of Anglo-Liberal Judaism and the founding president of the World Union for Progressive Judaism, a scholar of the Hebrew Bible, rabbinic literature and New Testament, an influential anti-Zionist leader in the communal body, the Anglo-Jewish Association, and an educator. He was a significant figure in the contexts of modern Jewish religious thought, Jewish-Christian relations, and Anglo-Jewish socio-politics.