Alfred Daniel Vidler was the son of Thomas Vidler and Harriet Death Vidler. Thomas was the son of Thomas Vidler (c 1795-1851) and Ann Smith Vidler. Thomas was the son of William Vidler (d 1826) and Mary Vidler Vidler. William may have been the son of William and Mary Vidler who married 1748 in Finsbury. Mary was certainly the daughter of Thomas Vidler (d 1777) and Margaret Westgarth Vidler (d 1780) and is mentioned in her mother's will. Margaret was likely the daughter of Thomas Westgarth (d.1746) and his wife Margaret (d. 1774) given that the latter left most of her estate to John Westgarth of St. Paul's churchyard, her executor, who was Margaret Westgarth's brother (mentioned in her will and that of her husband Thomas Vidler).