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Male William O'Brien Click to view William O'Brien in the family tree

William was born about 1692.  William's father was William O'Brien and his mother is Mary Villiers.  His paternal grandfather was William O'Brien and his paternal grandmother is Margaret Boyle; his maternal grandfather was Edward Villiers and his maternal grandmother is Frances Howard. He has two brothers named Charles and James.  He is the oldest of the three children. He has a half-sister named Mary.


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