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Father: Thomas Hennessey
Born:
Marr:
Died:
Mother:
Born:
Died:
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 | Denis O'Brien 
Born: -
Marr: 25 FEB 1827 - St. Finbar's RC Church, Drimoleague, Co. Cork, Ireland
Died: -
Other Spouses:
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 | Mary Hennessey 
Born: -
Died: -
Other Spouses:
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 | 1. Mary O'Brien Martin Born: ABT 1827 - Drimoleague, Co. Cork, Ireland Marr: 1846 - John Barrett Died: - |  | 2. Norry O'Brien  Born: - Marr: 1838 - Thomas O'Brien Died: - |  |
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 | 3. Timothy O'Brien  Born: - Marr: 1847 - Mary McCarthy Died: - |  | 4. Patrick O'Brien  Born: - Marr: 1857 - Mary Connolly-Brack Died: - |  |
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 | 5. Margaret O'Brien  Born: - Marr: 1837 - John Hennessey Died: - |  | 6. Denis O'Brien  Born: SEP 1834 - Drimoleague, Co. Cork, Ireland Marr: - Died: - |  |
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