J. R. R. Tolkien in his novella Farmer Giles of Ham suggests (tongue-in-cheek) that the 'worm' element in Worminghall derives from the dragon in the story.
Its endowment was granted in 1363, and included the church of Pagham, Sussex, along with (initially) eight Oxford houses' rents and a portion of the rents from Woodford, Northamptonshire and Worminghall, Buckinghamshire, where the Priory had manors.