1  John O'Brien  1785 - Unknown
.  +Katherine Haley  1788 - Unknown
.  2  Edward O'Brien  1818 -
.  2  Maurice O'Brien  1820 - 1893
....  +Johanna  1820 - 1877
....  3  John O'Brien  1845 -
.......  +Mary  1850 -
....  3  Elizabeth R. O'Brien  1846 - 1916
.......  +Patrick Shean  1847 - 1927
.......  4  Mary A. Shean  1872 -
.......  4  William F. Shean  1873 - 1902
..........  +Mary J.  1874 - 1902
.......  4  Josephine A. Shean  1875 - 1943
.......  4  Elizabeth L. Shean  1877 - 1918
..........  +(Fnu) Kearns  
..........  5  Mary V. Kearns  1905 - 1983
.......  4  Patrick T. Shean  1878 - 1940
.......  4  Maurice E. Shean  1880 - 1906
.......  4  Katherine A. Shean  1885 - 1951
.  2  Timothy J. O'Brien  1822 - 1898
....  +Elizabeth Thompson  1838 - Unknown
....  3  John J. O'Brien  1859 - 1916
.......  +Celia Ann Finn  1865 - 1940
.......  4  John Edward O'Brien  1888 - 1966
..........  +Antoinette (Anna) Wagner  1881 - 1965
.......  4  Joseph Timothy Francis O'Brien  1890 - 1933
.......  4  William Henry O'Brien  1891 - 1960
..........  +Estelle  
.......  4  Elizabeth C. O'Brien  1894 - 1920
.......  4  Fredrick Arthur O'Brien  1895 - 1954
..........  +Mary G. Moore  1901 - 1966
.......  4  Maurice Paul O'Brien  1896 - 1935
.......  4  Mary Margret O'Brien  1899 - 1977
.......  4  Margret O'Brien  1899 - 1900
.......  4  Austin O'Brien  1901 - 1975
..........  +Mary Agnes Thomasina Cullen  1901 - 1987
..........  5  Austin C. O'Brien, Jr.  1928 -
.............  +Ann Izoriah Martin  1933 - 2003
.............  6  Karen Ann O'Brien  1954 -
................  +Mike Abbott  
.............  *2nd Husband of Karen Ann O'Brien:  
................  +Andrew Donald  
................  7  Patrick Donald  
................  7  Ann Izoriah Donald  1976 -
................  7  Luke Caleb Donald  
.............  6  Lisa Ann O'Brien  1957 -
................  +Jimmy Ray McKenzie  
................  7  Shawn O'Brien McKenzie  1984 -
................  7  Raeann McKenzie  1986 -
.............  *2nd Husband of Lisa Ann O'Brien:  
................  +Kenneth Sweet  1951 -
.............  6  Nancy Ann O'Brien  1959 -
................  +Gregory Reilly  1954 -
................  7  Kaitlin Ann Reilly  1993 -
.............  6  Hugh Christopher O'Brien  1961 -
.............  6  Michael Sean O'Brien  1964 -
................  +Lisa Beth Chatzky  1967 -
................  7  Samantha Ann O'Brien  1990 -
.......  *2nd Wife of Austin O'Brien:  
..........  +Bertha Jane Sparks  1910 - 1992
..........  5  James Austin O'Brien  1951 -
.......  4  Hugh Alfred O'Brien  1903 - 1973
.......  4  Katherine Ester O'Brien  1906 - 2000
....  3  William Edward O'Brien  1862 - 1926
.......  +Bridget C. McDermott  1861 - 1933
.......  4  Mary Catherine O'Brien  1891 - 1970
.......  4  Edward William O'Brien  1892 - 1967
..........  +Louise M. Brennon  1895 - 1964
..........  5  William E. O'Brien  1925 -
.............  +Patricia L.  1933 -
.............  6  Paula O'Brien  1959 -
..........  5  Elizabeth O'Brien  1927 -
..........  5  Edward O'Brien  1930 -
..........  5  Eileen O'Brien  1930 -
.......  4  Margret M. O'Brien  1897 - 1974
....  3  Mary Jane O'Brien  1862 - 1937