Prince / Duke / Marquess / Earl / Viscount / Lord
| Name | Date of Birth | Date of Death | Beamish Person Id | Rush Id |
|---|---|---|---|---|
| MANNINGHAM-BULLER John Mervyn | 1932-02-28 | 2022-06-25 | 4940 | |
| MANNINGHAM-BULLER Reginald Edward | 1905-08-01 | 1980-09-07 | 1195 | 8821 |
| MANSEL Thomas | 1667-11-09 | 1723-12-10 | 3500 | |
| MANSFIELD Guy Rhys John | 4395 | |||
| MANSFIELD John William | 1857-07-10 | 1933-01-06 | 7088 | |
| MANSFIELD William Rose | 1819-06-21 | 1876-06-23 | 317 | |
| MANSFIELD John Edward Terence | 1920-09-04 | 2002-06-02 | 4520 | |
| MANSFIELD Ralph Sheldon | 1892-07-19 | 1964-10-28 | 7089 | |
| MANSFIELD William | 1855-08-21 | 1921-11-02 | 654 | |
| MAPLES John Cradock | 1943-04-22 | 2012-06-09 | 2279 | 466 |
| MARGESSON Richard Francis David | 4307 | |||
| MARGESSON Henry David | 1890-07-26 | 1965-12-24 | 943 | 4927 |
| MARGESSON Francis Vere Hampden | 1922-04-17 | 2014-11-11 | 4761 | |
| MARJORIBANKS Dudley Churchill | 1874-03-02 | 1935-04-23 | 5596 | |
| MARJORIBANKS Dudley Coutts | 1820-12-29 | 1894-03-04 | 384 | 2571 |
| MARJORIBANKS Edward | 1849-07-08 | 1909-09-15 | 5595 | 2572 |
| MARKHAM Nicholas Francis | 4209 | |||
| MARKS Michael | 1920-08-27 | 1998-09-09 | 5210 | |
| MARKS Stuart Adam | 8895 | |||
| MARKS Jonathan Clive | 2810 |