Lewisam is named after the eponymous district of Lewisham in London, though early in its history, the 'h' in Lewisham fell out of use and it is not quite clear why, despite both areas being pronounced in the same manner. Due to this fact, as well as a tendency to conflate the area with Newlands, Highlands or the more prestigious Chisipite, non-residents tend to mispronounce Lewisam as Lewi-sam rather than the correct Lew-shem or Lewi-shem.
