Governor Macquarie named the Vale of Clwydd on 29 April 1815. After leaving the base of Mount York he described his party’s route along Cox’s Road:“we pursued our journey in the carriage over a fine plain verdant country of open forest land through a beautiful extensive vale of five miles which I have named the Vale Clwydd after the vale of the same name in Wales". William Mylecharane (1832-1917) licensed surveyor in 1892 recorded the Aboriginal name for, The Vale of Clwydd as, Tuiwon. Ref: Smith, Jim. Does the Cox River have an Aboriginal name? Blue Mountains Historical Society, Hobby’s Outreach Vol. 28; No. 3, June – July 2016.