Second son of Elizabeth Thomas, a convict transported on the 'Bellona' in 1793 and her first son Joseph was born during the voyage, she later married John Baylis a Private in the NSW Corps; William baptized 25 Dec 1794 at St Phillip's CoE, Macquarie Street, Sydney; his marriage 2 Sep 1816 is the first one recorded in the register at St. Peter's, Richmond; additional BDM marriage registration number- 16/1816 V181616 156; according to Ezzy family records, wife Lucy "...was buried in St Matthew's Windsor, in the Family Vault with her daughter Jane and her first husband William Thomas Baylis";