Mary married John JEFFREY on 24 Oct 1866 in Port Burwell, Ontario. John (son of Honourable Andrew JEFFREY and Janet HALL) was born on 14 Feb 1844 in Cobourg, Ontario; died on 4 Mar 1890 in Owen Sound, Ontario; was buried on 7 Mar 1890 in Cobourg Union Cemetery, Cobourg, Ontario. [Group Sheet] [Family Chart]

1. Janet Maud JEFFREY was born on 6 Jun 1867; died on 4 May 1939 in Toronto.
2. Alexander Hall JEFFREY was born on 8 May 1869; died on 11 Apr 1942 in Toronto, Ontario; was buried in 1942 in Mount Pleasant Cemetery, Toronto, Ontario.
3. Mary Ethelwyn JEFFREY was born on 14 Dec 1873; died on 21 Mar 1952 in Montreal.
4. John Russell JEFFREY was born on 15 Nov 1874; died on 10 Feb 1960 in Toronto; was buried in Little Lake Cemetery, Peterborough, Ontario, Canada.
5. Daughter JEFFREY was born on 11 May 1879; died on 12 May 1879.
6. Douglas Sutherland JEFFREY was born on 13 Sep 1880; died on 26 Aug 1881; was buried in Cobourg Union Cemetery, Cobourg, Ontario.
7. Fraser JEFFREY was born on 23 Jan 1884 in Cobourg, Ontario; died on 24 Mar 1960 in Wauwatosa, Milwaukee, Wisconsin; was buried in Forest Home Cemetery, Milwaukee, Wisconsin, USA.
8. Jessie Belle JEFFREY was born on 22 Jul 1885 in Cobourg, Ontario; died about 1975 in Toronto; was buried in 1975 in Cobourg Union Cemetery, Cobourg, Ontario.