Brennan
Irish surname meaning "rain, moisture, drop".
Meaning and origin
Brennan represents an English form of the Irish surname Ó Braonáin, which comes from an Irish byname meaning rain or moisture.
How to pronounce Brennan
| English (US) | BREN-un |
|---|
About this entry
Drafted with the help of an AI model, then checked by a person. Last checked on 16 September 2026.
The sources behind this entry are listed in the app.