William married Phoebe Euphemenia Densmore on 24 Jan 1840 in Rawdon, Nova Scotia, Canada. Phoebe (daughter of John Densmore and Ruth Rhoda Whittier) was born on 31 May 1820 in Hants County, Nova Scotia, Canada; died on 26 Oct 1865 in East Wawanosh Township, Ontario, Canada; was buried in 1865 in Westfield Methodist Cemetery, Westfield, Ontario, Canada. [Group Sheet] [Family Chart]

1. Mary Jane McDowell was born on 19 Nov 1840 in Rawdon, Nova Scotia, Canada; died on 27 Dec 1927 in Midland County, Michigan, USA; was buried in Forest Lawn Cemetery, Saginaw, Michigan, USA.
2. John Henry McDowell was born on 17 Dec 1843 in Stewiacke, Nova Scotia, Canada; died on 6 May 1928 in Westfield, Ontario, Canada; was buried in Westfield Methodist Cemetery, Westfield, Ontario, Canada.
3. Robert Ernest McDowell was born on 27 Feb 1845 in Stewiacke, Nova Scotia, Canada; died on 19 Aug 1931 in Westfield, Ontario, Canada; was buried on 21 Aug 1931 in Westfield Methodist Cemetery, Westfield, Ontario, Canada.
4. William McDowell, Jr. was born on 10 Feb 1846 in Stewiacke, Nova Scotia, Canada; died on 31 May 1924 in Sioux City, Iowa, USA; was buried on 3 Jun 1924 in Logan Park Cemetery, Sioux City, Iowa, USA.
5. Edward McDowell was born on 5 Feb 1849 in Stewiacke, Nova Scotia, Canada; died on 27 Apr 1934 in Goderich, Ontario, Canada; was buried in Maitland Cemetery, Goderich, Ontario, Canada.
6. Julia McDowell was born on 10 May 1852 in Lancaster, New York, USA; died on 27 Sep 1932 in Freeland, Michigan, USA; was buried on 29 Sep 1932 in Pine Grove Cemetery, Freeland, Michigan, USA.
7. Hiram McDowell was born on 21 Aug 1854 in Newstead, New York, USA; died on 7 Apr 1934 in Pickford, Michigan, USA; was buried in Cottle Cemetery, Pickford, Mackinac County, Michigan, USA.
8. Elmira P. McDowell 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.
9. Sarah Ruth McDowell was born on 22 Feb 1859 in East Wawanosh Township, Ontario, Canada; died on 30 Jun 1947 in Hood River, Oregon, USA; was buried in Idlewilde Cemetery, Hood River, Oregon, USA.
10. Rebecca McDowell was born on 2 Oct 1861 in Westfield, Ontario, Canada; died on 16 Mar 1947 in Sault Ste. Marie, Michigan, USA; was buried in Pine Grove Cemetery, Sault Ste. Marie, Michigan, USA.

William married Mary Jardine on 26 Nov 1872 in West Wawanosh Township, Huron County, Ontario, Canada. Mary (daughter of Joseph W. Jardine and Agnes Rae) was born in 1837 in Scotland, United Kingdom; died on 2 Feb 1923 in Faulkton, South Dakota, USA; was buried in Faulkton Cemetery, South Dakota, USA. [Group Sheet] [Family Chart]

1. Dr. Albert Jardine McDowell was born on 13 Apr 1875 in Blyth, Ontario, Canada; died on 14 May 1943 in Faulkton, South Dakota, USA; was buried in Faulkton Cemetery, South Dakota, USA.
2. Dr. Charles McDowell was born on 13 Oct 1877 in Blyth, Ontario, Canada; died on 17 Jan 1943 in Rapid City, South Dakota, USA; was buried in Mountain View Cemetery, Rapid City, South Dakota, USA.

Robert married Mary Herbert before 1816 in Republic of Ireland. Mary was born in 1793 in Northern Ireland, United Kingdom; died on 17 Aug 1884 in Franklin County, Pennsylvania, USA; was buried in Harrisville Prairie Cemetery, Harrisville, Pennsylvania, USA. [Group Sheet] [Family Chart]