- this week

Gender: M Meaning of O'Brien: "descendant of Brian" Origin of O'Brien: Irish

The use of O-prefixes could create the next wave of Irish-inflected names, offering an innovative way of honoring a relative with the old-fashioned moniker Brian. On Downton Abbey, the surname O'Brien was heard so often, it began to seem like a first.

Famous People Named O'Brien

Pop Culture References for the name O'Brien

Star Trek character Miles O'Brien

O'Brian, O'Bryan