O'Brien family

O'Brien was the surname of an wizarding family. It is unknown if they were pure-blood, or had both Muggle and magical heritage.

Known family members

 * Cormac O'Brien — one of the original twelve American Aurors
 * Harvey O'Brien — a Hufflepuff student at Hogwarts School of Witchcraft and Wizardry in the 1990s

Etymology
O'Brien is an Anglicized form of the Irish Gaelic surname Ó Briain, meaning "descendant of Brian," an Irish male given name thought to derive from the Celtic element bre, meaning "hill," or "high."