Grainger is a surname of English origin.
[1] It is a variant of the surname Granger, which is an occupational name for a farm bailiff.
[2] The farm bailiff oversaw the collection of rent and taxes from the barns and storehouses of the lord of the manor.
[2] This officer's Anglo-Norman title was grainger, and Old French grangier, which are both derived from the Late Latin granicarius (a derivative of granica, meaning "granary").
[2]