or Ralpho. The squire of Hudibras. The model was Isaac Robinson, a zealous butcher in Moorfields, always contriving some queer art of church government. He represents the Independent party, and Hudibras the Presbyterian. Ralph rhymes with half and safe.
“He was himself under the tyranny of scruples as unreasonable as those of ... Ralpho.” —Macaulay.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Ralph from Infoplease: