Current translation for Hamstreet And Orlestone
  ham derived from hamm - Denotes a piece of land surrounded with paling, wicker-work, etc., and so defended against water, which would otherwise wash it away, so a valley settlement or settlement with a jetty.
  street derived from via strata - originally from the latin via strata(high paved road) -Old English stret (Mercian, Kentish), stræt (West Saxon)
  and derived from and - and
  orle derived from orildu/horh - very old / clammy air - foggy
  stone derived from stan - stone - probably a roman road, milestone or builders stone
Place name translation provided by saxonhistory.co.uk