William McMahon O'Brien

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- 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
- 3 John W O'Brien [1.1.1]
- 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
- 3 Margaret Elizabeth O'Brien [1.2.1]
- 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
- 3 Richard W Moore [1.3.1]
- 2 John W O'Brien [1.1]