Geoffrey the Grammarian

Geoffrey the Grammarian (fl. 1440) (in Latin: Galfridus Grammaticus) was a medieval monk and a grammarian who wrote several treatises.

He was originally from Norfolk.

In the late 15th century he published the Thesaurus Linguae Romanae et Britannicae which was the first English-to-Latin wordbook.

The Promptorium parvulorum is attributed to him.