Joseph married Catherine CARPENTER in 1856. Catherine (daughter of Jeremiah CARPENTER and Marie DUPUIS) was born on 27 Apr 1838 in Jefferson County, New York, USA; died on 2 Mar 1914 in Deseronto, Tyendinaga Twp, Hastings County, Ontario,Canada. [Group Sheet] [Family Chart]

1. Mary Elizabeth BRENNAN was born on 3 Oct 1866 in Richmond Twp, Lennox & Addington County, Ontario, Canada; died on 31 Dec 1938 in Richmond Twp, Lennox & Addington County, Ontario, Canada.
2. William BRENNAN was born on 19 Mar 1859 in Adams Center, Jefferson, New York, USA; died on 16 Mar 1938 in Hotel Dieu Hospital, Kingston, Ontario, Canada.
3. Francis BRENNAN was born on 9 Sep 1857 in Adams, Jefferson, New York, USA; died on 23 Oct 1931 in Deseronto, Tyendinaga Twp, Hastings County, Ontario,Canada.
4. Anna Maria BRENNAN was born on 25 Aug 1870 in Kingsford, Tyendinaga Twp, Hastings County, Ontario, Canada; died on 22 Apr 1937 in Chicago, Cook County, Illinois, USA.
5. John Joseph BRENNAN was born on 12 Mar 1876 in Tyendinaga Twp, Hastings County,Ontario, Canada; died on 9 Dec 1948 in Belleville, Thurlow Township, Hastings County, Ontario, Canada.
6. Ellen BRENNAN was born on 1 Mar 1868 in Tyendinaga Twp, Hastings County,Ontario, Canada; died on 17 Jan 1936 in Chicago, Cook County, Illinois, USA.
7. James BRENNAN was born on 21 Apr 1862 in Watertown, Jefferson County, New York, USA; died on 25 Jan 1940 in Chicago, Cook County, Illinois, USA.
8. Sarah Jane BRENNAN was born on 16 Feb 1874 in Tyendinaga Twp, Hastings County,Ontario, Canada; died on 26 Jun 1951 in Kingston, Frontenac County, Ontario, Canada.