Duncan married Margaret Ann COONS on 9 Aug 1888 in , Glengarry Co., Ontario, Canada. Margaret was born about 1862 in Matilda Twp., Dundas, Ontario, Canada; died on 12 Jun 1899 in Douglas, Renfrew, Ontario, Canada; was buried in Douglas, Renfrew, Ontario, Canada. [Group Sheet] [Family Chart]

1. Jennie Mabel 'Clara' STEWART was born on 25 Jul 1888 in Douglas, Renfrew, Ontario, Canada; died on 16 Jul 1956; was buried in Douglas, Renfrew, Ontario, Canada.
2. Douglas Paul STEWART was born on 2 May 1892 in Douglas, Renfrew, Ontario, Canada; died on 2 May 1974 in Renfrew, Renfrew, Ontario, Canada; was buried in Douglas, Renfrew, Ontario, Canada.
3. Marjorie Jean STEWART was born on 15 Mar 1907 in Matilda Twp., Dundas, Ontario, Canada; died on 21 Mar 1994 in Renfrew, Renfrew, Ontario, Canada; was buried in Douglas Public Cemetery, Renfrew, Ontario, Canada.
4. Anna Louise STEWART was born on 25 Sep 1908 in Matilda Twp., Dundas, Ontario, Canada; died on 13 Aug 1970 in Kingston, Frontenac, Ontario, Canada; was buried in Douglas, Renfrew, Ontario, Canada.

Duncan married Annie Louise MCCLURE on 13 Jun 1904 in , Peel Co., Ontario, Canada. Annie was born about 1871 in Brampton, Peel, Ontario, Canada; died on 14 Sep 1919; was buried in Douglas, Renfrew, Ontario, Canada. [Group Sheet] [Family Chart]

1. Gordon McClure STEWART was born on 5 May 1905 in Douglas, Renfrew, Ontario, Canada; died on 24 Oct 1989 in Renfrew, Renfrew, Ontario, Canada; was buried in Douglas, Renfrew, Ontario, Canada.
2. Sgt. John Chesney STEWART was born on 24 Aug 1913 in Douglas, Renfrew, Ontario, Canada; died on 7 Dec 2002 in Ottawa, Carleton, Ontario, Canada; was buried in Douglas, Renfrew, Ontario, Canada.