Patrick married Janet MCCONNELL in 1828 in Hull, Quebec. Janet (daughter of William MCCONNELL and Janet RIDDEL) was born in 1807 in , , , Scotland; died on 14 Nov 1893 in Westmeath Twp., Renfrew, Ontario, Canada; was buried in Westmeath, Renfrew, Ontario, Canada. [Group Sheet] [Family Chart]

1. John Patrick O'BRIEN was born on 10 Jan 1830 in , , Quebec, Canada; died on 31 Jul 1904 in Westmeath Twp., Renfrew, Ontario, Canada; was buried in Greenwood, Renfrew Co., Ontario, Canada.
2. Emma Jane O'BRIEN was born in 1831 in Hull, , Quebec, Canada; and died.
3. Thomas Arthur O'BRIEN was born on 6 Mar 1833 in Allumette Island, Pontiac, Quebec, Canada; died on 5 Dec 1917 in Westmeath Twp., Renfrew, Ontario, Canada; was buried in Westmeath Twp., Renfrew, Ontario, Canada.
4. William O'BRIEN was born about 1836 in Westmeath Twp., Renfrew, Ontario, Canada; and died.
5. Edwin O'BRIEN was born about 1838 in Westmeath Twp., Renfrew, Ontario, Canada; died in 1888.
6. Mary O'BRIEN was born on 20 Feb 1841 in Westmeath Twp., Renfrew, Ontario, Canada; died on 12 Mar 1923 in Westmeath Twp., Renfrew, Ontario, Canada; was buried in Westmeath, Renfrew, Ontario, Canada.
7. Henry Alexander O'BRIEN was born on 13 Feb 1843 in Westmeath Twp., Renfrew, Ontario, Canada; was christened on 9 Apr 1843 in Westmeath Twp., Renfrew, Ontario, Canada; died on 10 Jun 1916 in Westmeath Twp., Renfrew, Ontario, Canada; was buried in Westmeath, Renfrew, Ontario, Canada.
8. Eliza Amelia O'BRIEN was born on 13 Nov 1845 in Westmeath Twp., Renfrew, Ontario, Canada; was christened on 10 May 1846 in Westmeath Twp., Renfrew, Ontario, Canada; and died.
9. Charles McConnell O'BRIEN was born on 16 Oct 1847 in Westmeath Twp., Renfrew, Ontario, Canada; died on 3 Apr 1918 in Minneapolis, Hennepin, Minnesota, U.S.A..
10. Margaret E O'BRIEN was born on 17 Mar 1850 in Westmeath Twp., Renfrew, Ontario, Canada; was christened on 26 May 1850 in Westmeath Twp., Renfrew, Ontario, Canada; and died.