+———Robert DICKSON
      |
  +———Andrew DICKSON (1851 – )
  |   |    
  |   +———Margaret WALLACE
  |    
  Allan DICKSON (9 May 1875 Fitzroy, Ontario, Canada – )
  |        
  |   +———Thomas DELAHUNT (1823 Ontario, Canada – 14 Jan 1892)
  |   |
  +———Mary DELAHUNT (1851/2 Huntley, Ontario, Canada – )
      |        
      |   +———John OLIVE (1788 Borriskane, Ireland – 27 Apr 1867)
      |   |
      +———Elizabeth OLIVE (1824 Ireland – 26 Feb 1900 Fitzroy, Ontario, Canada)
          |        
          |   +———William CAVANAGH (1759 Tipperary, Ireland – abt 1819 Tipperary, Ireland)
          |   |
          +———Mary CAVANAGH (abt 1800 Tipperary, Ireland – 16 Oct 1867 Huntley, Ontario, Canada)
              |    
              +———Elizabeth “Eliza” DONNELLY (abt 1769 Tipperary, Ireland – abt 1829 Tipperary, Ireland)