Geoffrey the Grammarian (fl.
1440) (in Latin: Galfridus Grammaticus) was an English medieval monk and grammarian who wrote several treatises.
Geoffrey was originally from Norfolk, England.
[1] In the late 15th century, Geoffrey published the Thesaurus Linguae Romanae et Britannicae, which was the first English-to-Latin wordbook.
[2] The Promptorium parvulorum also is attributed to Geoffrey.