Interactive tree of Catherine Alma O'Brien
1909–1963♂ Athol Robert Grieve
1885–1967♀ Catherine Alma O'Brien
1876–1952♂ Henry Powell Grieve
1833–1913♂ Robert Grieve
1834–1908♀ Isabella Mary Cully
1804–1892♂ John Grieve
1804–1888♀ Mary Glendinning …