Hallamshire (or Hallam) is the historical name for an area of South Yorkshire, England, approximating to the current City of Sheffield local government area. The origin of the name is uncertain. The English Place-Name Society describe "Hallam" originating from a formation meaning "on the rocks". Alternative theories are that it is derived from halgh meaning an area of land at a border, Old Norse hallr meaning a slope or hill, or Old English heall meaning a hall or mansion.