[b] Marc Drogin noted in his instructional manual, Medieval Calligraphy: Its History and Technique (1980), that "for the past half-century every edition of The Oxford English Dictionary has listed an incorrect page reference for, of all things, a footnote on the earliest mention of Titivillus."
Titivillus gained a broader role as a subversive figure of physical comedy, with satirical commentary on human vanities, in late medieval English pageants, such as the Iudicium that finishes the Towneley Cycle.
When, however, he commanded the demon to tell what he carried, the evil one said: "These are the syllables and syncopated words and verses of the psalms which these very clerics in their morning prayers stole from God; you can be sure I am keeping these diligently for their accusation.
As to the demon's name, Titivillus, Vernet points to The City of God (Book IV, Chapter 8), in a passage in which Augustine, while giving examples of the numerous Roman deities assigned to each step of the agricultural process, mentions a goddess Tutilina whose job is to watch over grain after it was collected and stored.
However, we must imagine a series of copyists' errors (perhaps in the copy of City of God available to Johannes Galensis) to arrive at "Titivillus" and its many variants: Tutivillus, Tytivillum, Tintillus, Tantillus, Tintinillus, Titivitilarius, Titivilitarius.