Robinocracy
/ˌrɒbɪˈnɒkrəsi/rare from the mid 17th to the end of the 19th cent
noun
Chiefly with the. Rule by the statesman Sir Robert Walpole (1676–1745), especially the period between 1721 and 1742 during which he was acknowledged to be the British Prime Minister.
Origin
Early 18th century. From Robin, pet-form of the male forename Robert, with allusion to the statesman Sir Robert Walpole + -ocracy.