Where does “Brennan” come from?
Brennan is an English surname derived from Irish Ó Braonáin, based on Irish braon and Old Irish bráen.
Ancestry of “Brennan”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Irish | Ó Braonáin | descendant of Braonán |
| 2 | Irish | braon | a drop; gathering, pus |
| 3 | Old Irish | bráen | rain, moisture, drop |