1  William BLAIR 
   +  Elizabeth MCCALLUM 
      2  Katherine Campbell Elizabeth BLAIR (3 Feb 1863 Pakenham, Ontario, Canada – 27 Dec 1927 Nepean, Ontario, Canada)
         +  Ledger Graham OWENS (16 Feb 1851 – 13 Jun 1915 Ottawa, Ontario, Canada)
            3  Ethel Phoebe OWENS (3 Feb 1884 Kinburn, Ontario, Canada – 2 Feb 1979 Toronto, Ontario, Canada)
            3  Mabel Elizabeth OWENS (16 Jan 1886 – 6 Jun 1978)
               +  Cedric Mooney GODDARD (16 Dec 1876 – 10 Jun 1962)
                  4  Katherine GODDARD (1916 – 2000)
            3  Edith E. OWENS (1887 Fitzroy, Ontario, Canada – 1972 Ottawa, Ontario, Canada)
               +  Frederick Ivan HELSON (23 Aug 1885 – 24 Aug 1964 Ottawa, Ontario, Canada)
                  4  Edith Phyllis HELSON (10 Sep 1918 Ottawa, Ontario, Canada – 1990 White Rock, British Columbia, Canada)
            3  Herbert Campbell OWENS (22 Feb 1891 – 1899 Nepean, Ontario, Canada)