M
- M. C. Brennan
- Maeve Brennan
- Margaret Brennan
- Martin Brennan (engineer)
- Martin Brennan (Irish politician)
- Matt Brennan
- Michael Brennan (field hockey player)
- Michael Brennan (Fine Gael)
- Michael Brennan (Progressive Democrats)
- Michael F. Brennan
- Mitch Brennan, Australian rugby league footballer
- Moya Brennan, singer and the sister of Enya
Read more about this topic: Brennan (surname)