William McMahon O'Brien
1840 - 1877 (37 years)( = Descendancy chart to this point, = Expand, = Collapse)
- 1 William McMahon O'Brien [1] b. 1840 d. 1 Dec 1877
- Elizabeth Landers b. 1848
- 2 John W O'Brien [1.1] b. 30 May 1871 d. 11 Aug 1963
- Florence Miller
- 3 John W O'Brien [1.1.1] b. 17 Nov 1909 d. 3 Jul 1911
- Florence Miller
- 2 William David O'Brien [1.2] b. 28 Nov 1872 d. 22 May 1944
- Margaret Fitzgerald b. 13 Apr 1877
- 3 Margaret Elizabeth O'Brien [1.2.1] b. 27 Sep 1910
- 3 Aileen Mary O'Brien [1.2.2] b. 4 Jan 1912
- 3 Barbara Louise O'Brien [1.2.3] b. 6 Aug 1914
- 3 William Fitzgerald O'Brien [1.2.4] b. 18 Mar 1916
- 3 Lawrence Landers O'Brien [1.2.5] b. 21 Aug 1921
- Margaret Fitzgerald b. 13 Apr 1877
- 2 Elizabeth Mary O'Brien [1.3] b. 30 Apr 1874 d. 26 Jun 1959
- William R Moore
- 3 Richard W Moore [1.3.1] b. 10 Oct 1904
- William R Moore
- 2 John W O'Brien [1.1] b. 30 May 1871 d. 11 Aug 1963
- Elizabeth Landers b. 1848