Procrustes

In ancient Greek myth, and later in Roman myth, Procrustes was a bandit who tied his victims to an iron bed. If they didn't fit the length of the bed, he either cut off their legs or stretched them out to fit it. Eventually, the mythical hero Theseus defeated Procrustes and subjected him to the same treatment, except Theseus cut off his head as well as his legs.

English word: Our English word derives directly from the myth. Procrustean harsh or inflexible in fitting someone or something to a preconceived idea or system. We also have the phrase Procrustean bed, with the same meaning as in the original story.