Robert Walpole – Wikipedia

Robert Walpole, 1st Earl of Orford, KG PC (26 August 1676 – 18 March 1745; known between 1725 and 1742 as Sir Robert Walpole) was a British statesman and Whig politician who is generally regarded as the de facto first Prime Minister of Great Britain.. Although the exact dates of Walpole’s dominance, dubbed the “Robinocracy”, are a matter of scholarly debate, the period 1721–1742 is often used.

https://en.wikipedia.org/wiki/Robert_Walpole