Name
- Mallet, John Philip1
- Mandeville, Family1
- Manning, Henry Edward, Cardinal, RC Archbishop of Westminster1
- Markenfield, Family1
- Marmion, Family1
- Marshall, Family1
- Martin, Francis, Norroy1
- Mary I, of England1
- Mautravers, Family1
- Mayo, Charles Herbert, Vicar of Long Burton, county Dorset1
- Mazzinghi, Thomas John, Librarian of the Will. Salt Library, Stafford1
- Merton College, University of Oxford1
- Midleham, Family1
- Monro, David Binning, Provost of Oriel College Oxford1
- Monthermer, Family1
- Montpesson, Family1
- More, Family1
- Morgan, Family1
- Morgan, Octavius1
- Morgan, William, of Tredegar1