| Professor Roland Mortier FBA | Year of birth 1920 | Year of death 2015 | Year elected 1984 | Fellowship category Corresponding |
| Lord Claus Moser KCB, CBE, FBA | Year of birth 1922 | Year of death 2015 | Year elected 1969 | Fellowship category UK |
| Professor Ann Moss FBA | Year of birth 1938 | Year of death 2018 | Year elected 1998 | Fellowship category UK Emeritus |
| Revd Professor Charles Moule CBE, FBA | Year of birth 1908 | Year of death 2007 | Year elected 1966 | Fellowship category UK |
| Professor Roland Mousnier FBA | Year of birth 1900 | Year of death 1993 | Year elected 1971 | Fellowship category Corresponding |
| Professor Kenneth Muir FBA | Year of birth 1907 | Year of death 1996 | Year elected 1970 | Fellowship category UK |
| Professor John Henry Muirhead FBA | Year of birth 1855 | Year of death 1940 | Year elected 1931 | Fellowship category UK |
| Professor Dr Konrad Müller FBA | Year of birth 1920 | Year of death 2015 | Year elected 1982 | Fellowship category Corresponding |
| Professor Hermann Müller-Karpe FBA | Year of birth 1925 | Year of death 2013 | Year elected 1992 | Fellowship category Corresponding |
| Professor John Mulvaney CMG, FBA | Year of birth 1925 | Year of death 2016 | Year elected 1983 | Fellowship category Corresponding |
| Dr Alexander Stuart Murray FBA | Year of birth 1841 | Year of death 1904 | Year elected 1903 | Fellowship category UK |
| Professor George Gilbert Aimé Murray OM, FBA | Year of birth 1866 | Year of death 1957 | Year elected 1910 | Fellowship category UK |
| Sir James Murray FBA | Year of birth 1837 | Year of death 1915 | Year elected 1902 | Fellowship category UK |
| Professor Tauno Mustanoja FBA | Year of birth 1912 | Year of death 1996 | Year elected 1971 | Fellowship category Corresponding |
| Lord Michael Mustill FBA | Year of birth 1931 | Year of death 2015 | Year elected 1996 | Fellowship category UK |
| Sir Roger Mynors FBA | Year of birth 1903 | Year of death 1989 | Year elected 1944 | Fellowship category UK |