1  James JOHNSTON (9 Mar 1833 Huntley, Ontario, Canada – 19 Jun 1902 Huntley, Ontario, Canada)
   +  Rachel SHAW (25 Oct 1841 Fitzroy, Ontario, Canada – 19 Feb 1887 Huntley, Ontario, Canada)
      2  Henry Forbes JOHNSTON (12 Oct 1873 Huntley, Ontario, Canada – 11 Dec 1920 Saskatchewan, Canada)
         +  Ida Priscilla “Priscilla” OLIVE (15 Jul 1874 Ontario, Canada – 11 Feb 1973)
            3  Henry Osler JOHNSTON (26 Dec 1905 Huntley, Ontario, Canada – stillborn)
            3  Henry Osler JOHNSTON (14 Aug 1907 Carleton, Ontario, Canada – 1967)
               +  Eva BRISTOL (28 Apr 1911 Grey, Saskatchewan, Canada – 13 Mar 1998 Camrose, Alberta, Canada)
                  4  John David Forbes JOHNSTON (16 Oct 1948 Swan River, Manitoba, Canada – 4 Oct 1993 London, England)
            3  John Forbes JOHNSTON (3 Sep 1913 Woodrow, Saskatchewan, Canada – 15 Jan 1970 Swan River, Manitoba, Canada)