Duncan married Elmira P. McDowell on 23 Jun 1880 in Saginaw, Michigan, USA. Elmira (daughter of William J, McDowell, Sr. and Phoebe Euphemenia Densmore) was born on 9 Jun 1857 in East Wawanosh Township, Ontario, Canada; died on 16 Dec 1945 in Saginaw, Michigan, USA; was buried in Oakwood Cemetery, Saginaw, Michigan, USA. [Group Sheet] [Family Chart]

1. Edna Pearl McKellar was born on 7 Jan 1882 in Saginaw, Michigan, USA; died on 10 Sep 1964 in La Grange, Illinois, USA; was buried in Oakwood Cemetery, Saginaw, Michigan, USA.
2. Arthur Percy McKellar was born on 26 Feb 1893 in Saginaw County, Michigan, USA; died on 15 May 1957 in Saginaw County, Michigan, USA; was buried in Oakwood Cemetery, Saginaw, Michigan, USA.
3. William Duncan McKellar was born on 21 Jan 1887 in Saginaw, Michigan, USA; died on 6 Jan 1951 in Saginaw, Michigan, USA; was buried in Forest Lawn Cemetery, Saginaw, Michigan, USA.