+———John MARSHALL (Boston, Massachusetts, USA – )
                      |
                  +———James MARSHALL (1782 USA – 18 Mar 1852)
                  |
              +———Abial MARSHALL (26 May 1809 Kitley, Ontario, Canada – 2 Oct 1901 Washago, Ontario, Canada)
              |   |    
              |   +———Hannah TALLMAN (1786 – 1831)
              |
          +———Thaddeus Witherhead MARSHALL (28 Apr 1840 Kitley Twp, Ontario, Canada – 15 Apr 1923 Washago, Ontario, Canada)
          |   |    
          |   +———Charlotte FRALICK (1812 Kitley Twp, Ontario, Canada – 28 May 1887 Orillia, Ontario, Canada)
          |
      +———William Clinton MARSHALL (18 Jul 1887 – May 1944 Orillia, Ontario, Canada)
      |   |    
      |   +———Lillias Andrews KEMP (9 Sep 1852 – 9 Apr 1943 Ottawa, Ontario, Canada)
      |
  +———Leslie MARSHALL
  |   |        
  |   |   +———Layton GAMMON
  |   |   |
  |   +———Flora Elsie GAMMON (4 Sep 1894 – )
  |       |    
  |       +———Eliza Jane BLACKABY
  |    
  Terry MARSHALL 
  |    
  +———Francis MCCAULEY