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By Grace Royal · Jul 2026

O'brien

OriginIrish

Meaning"descendant of Brian"

GenderGirl

Also a boy's nameShow me O'brien as a boy's name

O'brien in pop culture

Sarah O'Brien
character on the British TV series "Downton Abbey"

O'brien on more lists

Irish Names for Girls

7 Letter Girl Names

Names Ending in N for Girls

Names That Mean Descendant

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