E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
I’sengrin or Sir Isgrim,
the wolf, afterwards created Earl of Pitwood, in the beast-epic of Reynard the Fox. Isengrin typifies the barons, and Reynard the church; and the gist of the tale is to show how Reynard bamboozles his uncle Wolf. (German, Isegrimm, a wolf, a surly fellow.)
