+———Thomas DELAHUNT (1823 Ontario, Canada – 14 Jan 1892)
      |
  +———Thomas DELAHUNT (1853 Ontario, Canada – 1933)
  |   |        
  |   |   +———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)
  |    
  Alfred Ernest DELAHUNT 
  |    
  +———Elena OLINE (1861 – )