+———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
          |
      +———Edward Oscar VANCE (1890 – 1972)
      |   |        
      |   |   +———William DOWNEY (1823 – 22 Oct 1889)
      |   |   |
      |   +———Charlotte DOWNEY (30 Aug 1849 – 25 Aug 1905)
      |       |    
      |       +———Isabella BARTON (1826 – 25 Dec 1862)
      |
  +———Thomas Edward VANCE (1924 – )
  |   |        
  |   |   +———Isaac Ben DAVIS
  |   |   |
  |   +———Katie Alexandra DAVIS (1901 March, Ontario, Canada – 1996)
  |       |    
  |       +———Elizabeth SMITH
  |    
  Trevor Edward VANCE (1975 – 1995)