During which years did the father of Maurice Macmillan serve as Prime Minister of the United Kingdom?
Maurice Macmillan: Maurice Victor Macmillan, Viscount Macmillan of Ovenden PC (27 January 1921 – 10 March 1984) was a British Conservative Party politician and Member of Parliament. Maurice Macmillan:  He was the only son of Harold Macmillan, who previously served as Prime Minister of the United Kingdom. Harold Macmillan: Maurice Harold Macmillan, 1st Earl of Stockton, {'1': ", '2': ", '3': ", '4': "} (10 February 1894 – 29 December 1986) was a British statesman of the Conservative Party who served as Prime Minister of the United Kingdom from 1957 to 1963.
1957 to 1963