+———Irwin VANCE (17 Mar 1819 Canada – 12 Dec 1911 March, Ontario, Canada)
      |
  +———Thomas VANCE (14 May 1847 – 14 Aug 1925 March, Ontario, Canada)
  |   |            
  |   |       +———William CAVANAGH (1759 Tipperary, Ireland – abt 1819 Tipperary, Ireland)
  |   |       |
  |   |   +———William CAVANAGH (abt 1798 Tipperary, Ireland – 1838 Fitzroy, Ontario, Canada)
  |   |   |   |    
  |   |   |   +———Elizabeth “Eliza” DONNELLY (abt 1769 Tipperary, Ireland – abt 1829 Tipperary, Ireland)
  |   |   |
  |   +———Eliza CAVANAGH (1828 Ontario, Canada – 10 Oct 1910)
  |       |        
  |       |   +———Thomas HODGINS
  |       |   |
  |       +———Rebecca HODGINS (28 Oct 1803 Tipperary, Ireland – 11 Jan 1878 Huntley, Ontario, Canada)
  |           |    
  |           +———Mary
  |    
  Thomas Mervyn VANCE (28 Nov 1887 March, Ontario, Canada – 13 Jan 1928 Carleton, Ontario, Canada)
  |        
  |   +———William DOWNEY (1823 – 22 Oct 1889)
  |   |
  +———Charlotte DOWNEY (30 Aug 1849 – 25 Aug 1905)
      |    
      +———Isabella BARTON (1826 – 25 Dec 1862)