Barons | Titles by Rank
- Barons of Mirbach
- Barons of Mirbach-Harff
- Barons of Mirville
- Barons of Möderndorf
- Barons of Moeller-Lilienstern
- Barons of Mogadouro
- Barons of Mogi-Guaçu
- Barons of Mogi-Mirim
- Barons of Mogofores
- Barons of Moimenta da Beira
- Barons of Molelos
- Barons of Molembais
- Barons of Monacilione
- Barons of Monção
- Barons of Monclar
- Barons of Mondim
- Barons of Monglat
- Barons of Moniz de Aragão
- Barons of Monjardim
- Barons of Monserrate
- Barons of Montagnac
- Barons of Montagny
- Barons of Montalegre
- Barons of Montalegre-I
- Barons of Montausier
- Barons of Montboissier Beaufort Canillac
- Barons of Montbui
- Barons of Monte Alto
- Barons of Monte Belo
- Barons of Monte Brasil
- Barons of Monte Carmelo
- Barons of Monte Castelo
- Barons of Monte Córdova
- Barons of Monte de Cedro
- Barons of Monte Mário
- Barons of Monte Mor
- Barons of Monte Pedral
- Barons of Monte Santo
- Barons of Monte Santo-I
- Barons of Monte Santo-II
- Barons of Monte Verde
- Barons of Monte Verde-I
- Barons of Montebello
- Barons of Montechiaro
- Barons of Monteiro de Barros
- Barons of Montendre
- Barons of Montes Claros
- Barons of Montesquieu
- Barons of Montesquiou
- Barons of Monteynard