What does "walpolean" mean?

Of or relating to Robert Walpole (1676–1745), British statesman generally regarded as having been the first British prime minister.

Walpolean

adj

adj ·Rare ·Advanced level

Adjective

1
Of or relating to Robert Walpole (1676–1745), British statesman generally regarded as having been the first British prime minister.
2
Of or relating to Horace Walpole (1717–1797), 4th Earl of Orford, English art historian and politician.

From Walpole + -an.