+———Leon MARION (13 Nov 1833 St. Scholastique, Quebec, Canada – )
  |    
  Ida Florence MARION (18 Jan 1871 Ontario, Canada – )
  |                
  |           +———John Thomas Sr. THOMAS (1751 London, England – 9 Jun 1822 Vaudreiul, Quebec, Canada)
  |           |
  |       +———Charles THOMAS (9 Sep 1793 Moose Factory, Northwest Territories, Canada – 8 Mar 1873 Golden Lake, Ontario, Canada)
  |       |   |    
  |       |   +———Margaret CREE (1750 James Bay, Rupert's Land, Canada – 31 Dec 1831 Moose Factory, Northwest Territories, Canada)
  |       |
  |   +———Edward THOMAS (18 Nov 1819 Cuare Island, Northwest Territories, Canada – 1897)
  |   |   |        
  |   |   |   +———John MANNALL (Ispswich, Suffolk, England – )
  |   |   |   |
  |   |   +———Hannah “Smurm” MANNALL (31 Aug 1795 Kenogamissi House, Northwest Territories, Canada – 16 Apr 1868 Ontario, Canada)
  |   |
  +———Catherine Mary THOMAS (25 Feb 1848 Wilberforce, Ontario, Canada – 1931)
      |        
      |   +———Philip PIERCE
      |   |
      +———Catherine PIERCE (1826 Wilberforce, Ontario, Canada – bef 1881)
          |    
          +———Ann HOPCROFT