+———David MCCOMB
      |
  +———William Stewart MCCOMB (1873 – 1953)
  |   |    
  |   +———Margaret HIGHLAND
  |    
  David Kenneth MCCOMB (1923 – 1992)
  |                
  |           +———Edward OWENS (1780 Burrisocaine, County Tipperary, Ireland – 23 Mar 1855 Fitzroy, Ontario, Canada)
  |           |
  |       +———John OWENS (1812 Tipperary, Ireland – 23 Dec 1891 Ontario, Canada)
  |       |   |    
  |       |   +———Elizabeth LEDGER (1791 Tipperary, Ireland – 1827 Fitzroy, Ontario, Canada)
  |       |
  |   +———John OWENS (bet 1844 and 1848 Fitzroy, Ontario, Canada – 1914)
  |   |   |    
  |   |   +———Jane HOBBS (1813 Tipperary, Ireland – 24 Jan 1893 Fitzroy, Ontario, Canada)
  |   |
  +———Ada Jane OWENS (1886 – 1955)
      |        
      |   +———John SHIELDS (abt 1825 – 18 Dec 1898)
      |   |
      +———Elizabeth “Lizzie” SHIELDS (abt 1858 – 1917)
          |    
          +———Eliza Jane JEFFREY (abt 1826 – 12 Jun 1913)