Current translation for Haywards Heath
  hay derived from heg  – hay or dried grass
  ward derived from weard  – used for administrative districts from 1300's
  s derived from s  – of as in 's(belongs to) or multiple
  heath derived from hæþ  – heath or wasteland where heather grows
“Used for administrative districts from 1300's hay or dried grass heath or wasteland where heather grows”
Place name translation provided by saxonhistory.co.uk