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Son of Private and Ellen O'Brien Husband of Margaret O'Brien Father of William O'Brien; Helen Titus; Margaret "Peg" Mignault and Mary Dowling Brother of Maurice O'Brien; William O'Brien; Thomas O'Brien; Jack O'Brien; Margaret Walsh and 5 others; Minnie Murphy; David O'Brien; Denis O'Brien; Bridget O'Brien and Ellen O'Brien « less