 The Roman settlement of Durovernum Cantiacorum ( " Kentish Durovernum " ) occupied the location of an earlier British town whose ancient British name has been reconstructed as * Durou ̯ ernon ( " Stronghold by the Alder Grove " ) , although the name is sometimes supposed to have derived from various British names for the Stour . ( Medieval variants of the Roman name include Dorobernia and Dorovernia . ) In Sub @-@ Roman Britain , it was known in Old Welsh as Cair Ceint ( " Fortress of Kent " ) . Occupied by the Jutes , it became known in Old English as Cantwareburh ( " Kentish Stronghold " ) , which developed into its present name . 
