+———Irwin VANCE (17 Mar 1819 Canada – 12 Dec 1911 March, Ontario, Canada)
  |    
  John Irwin VANCE (1860 – 1940)
  |            
  |       +———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