1  Catharine MOREHEAD 
   +  James IRVINE 
      2  Thomas IRVINE (1851 – )
         +  Ann GREENE (1851 – )
            3  Margaret Ann IRVINE (26 May 1873 Carleton Place, Ontario, Canada – )
            3  Robert Milton IRVINE (11 Mar 1878 – 10 Jan 1958)
               +  Adelaide L. PETTEFER (1876 – 17 Jan 1941)