William married Abigail Amelia JINKS in 1865. Abigail (daughter of Elijah JINKS and Esther B FERGUSON) was born in 1850; died on 6 Mar 1907 in Cherry Valley, Athol Twp, Prince Edward County, Ontario. [Group Sheet] [Family Chart]

1. Florence Amelia COWAN was born in 1884.
2. Amos Clayton COWAN was born on 4 Apr 1886 in Picton, Hallowell Twp, Prince Edward County, Ontario, Canada; died on 17 Nov 1954 in Toronto, Ontario, Canada.
3. Robert George COWAN was born on 20 Jan 1872 in Consecon, Hillier Twp, Prince Edward County, Ontario, Canada; died on 24 Apr 1936 in Cochrane, Ontario, Canada.
4. Henry Albert COWAN was born on 21 Jun 1896; died in 1955 in Cherry Valley, Athol Twp, Prince Edward County, Ontario.
5. Howard E COWAN was born on 30 Oct 1892 in Cherry Valley, Athol Twp, Prince Edward County, Ontario; died on 30 May 1957 in Hamilton, Wentworth County, Ontario, Canada.
6. William James COWAN was born on 12 Aug 1866 in Consecon, Hillier Twp, Prince Edward County, Ontario, Canada; died on 7 Dec 1924 in Killarney, Manitoba, Canada.
7. Annie G COWAN was born on 21 Aug 1866 in Picton, Hallowell Twp, Prince Edward County, Ontario, Canada; died on 21 Nov 1908 in Kingston, Frontenac County, Ontario, Canada.