Shipmates
- M -
| Name | Rank(s) | Ship(s) |
| Mabb, F. | AB | Adriatic |
| Madden, T. | AB | Lydgate |
| Magee, E. | Cook | Charles Cotesworth |
| Magner, J. | AB | Germanic |
| Magunnis, E. P. | Apprentice | Iquique |
| Mahen, P. | AB | Celtic |
| Mahony, D. | AB | Olympic |
| Mahony, J. | AB | Oceanic |
| Male, H. | AB | Olympic |
| Mallon, J. | AB | Celtic |
| Mancu, R. | OS | Runic |
| Manley, J. | AB | Olympic |
| Mannering, J. | AB | Olympic |
| Marsh, F. | AB | Runic |
| Marston, W. E. | AB | Olympic |
| Martin, F. | AB | Lydgate |
| Martell, C. | AB | Olympic |
| Martell, G. | QM | Olympic |
| Martin, A. E. | AB | Olympic |
| Martin, R. | AB | Iquique |
| Martins, A. | AB | Lydgate |
| Mason, E. | Joiner & AB | Oceanic, Cedric |
| Matelot, L. | AB | Oceanic |
| Matherson, D. | AB | Adriatic, Olympic, Titanic |
| Matheson, H. | OS | Arabic |
| Matthews, C. | AB | Olympic |
| Matthews, W. | AB | Olympic |
| Maxwell, J. | Carpenter | Titanic |
| May, W. | AB | Oceanic |
| Mead, J. | AB | Adriatic, Olympic |
| Mead, J. B. | AB | Olympic |
| Meaney, P. | AB | Cedric |
| Meldrum, G. | Mate | Iquique |
| Melson, A. P. | 3rd Mate | Adriatic |
| Melson, J. | OS | Adriatic |
| Menzler, H. | AB | Lydgate |
| Miller, J. | AB | Charles Cotesworth |
| Miller, J. M. | 6th Mate | Adriatic |
| Mills, G. | OS | Oceanic |
| Milton, J. | AB | Germanic |
| Mitchell, A. | AB | Adriatic, Olympic |
| Mitchell, Alfred | AB | Celtic |
| Mitchell, A. J. | Apprentice, AB | St. Cuthbert |
| Mitchell, G. P. | Apprentice, 3rd Mate | Iquique |
| Mitchell, W. | AB | Olympic |
| Moffat, A. | 3rd Mate | Germanic |
| Moir, A. | AB | Arabic |
| Molan, D. | AB | Cedric |
| Montenth, E. | AB | Germanic |
| Moody, J. P. | 6th Mate | Titanic |
| Moore, E. | OS | Adriatic |
| Moore, G. | AB | Titanic |
| Moore, J. | OS | Celtic |
| Moore, J. D. | AB | Oceanic |
| Moore, R. | Boatswain | Runic |
| Moore, T. | OS | Celtic |
| Moorman, E. | OS | Adriatic |
| Morgan, F. | AB, LO | Adriatic, Olympic |
| Morgan, H. | Boy | Lydgate |
| Morris, A. C. | AB | Adriatic, Olympic |
| Morris, J. H. | OS | Oceanic |
| Mortensen, P. | AB | Charles Cotesworth |
| Morton. R. L. | 6th Mate | Oceanic |
| Mowatt, W. | AB | Runic |
| Moyes, G. | AB, Carpenter | Runic |
| Mullen, C. | AB | Celtic |
| Mullen, M. H. | AB | Charles Cotesworth |
| Mulligan, John | AB | Runic |
| Mummery, J. | AB | Olympic |
| Munns, W. | AB | Arabic |
| Murdoch, S. | Master | Iquique |
| Murphy, A. | AB | Oceanic |
| Murphy, D. | Cook | Lydgate |
| Murphy, L. | AB | Arabic |
| Murphy, T. | AB | Adriatic |
| Murray, F. | OS | Oceanic |
| Murray, H. | AB | Adriatic, Olympic |
| Murray, J. (Liverpool) | AB | Oceanic |
| Murray, J. (London) | AB | Iquique |
| Murray, M. | AB | Celtic |
| Myan, J. | AB | Oceanic |
| Myerscough, S. | AB | Runic |