| Macartney (Earldom) |
George Macartney - Sat 1st Mar 1794
|
31 March 1806 |
- |
| Macartney (Viscountcy) |
George Macartney - Thu 19th Jul 1792
|
31 March 1806 |
- |
| Macartney (Barony) |
George Macartney - Fri 19th Jul 1776
|
31 March 1806 |
- |
| Macdonald (Barony) |
Alexander Macdonald - Thu 25th Jul 1776
|
- |
- |
| Macduff (Viscountcy) |
William Duff - Thu 26th Apr 1759
|
29 January 1912 |
- |
| Magennis (Viscountcy) |
Arthur Magennis - Tue 18th Jul 1623
|
- |
- |
| Maguire (Barony) |
Bryan Roe Maguire - Fri 3rd Mar 1628
|
- |
- |
| of Malton (Earldom) |
Charles Watson-Wentworth - Thu 17th Dec 1750
|
1 July 1782 |
- |
| Malton (Barony) |
Charles Watson-Wentworth - Thu 17th Dec 1750
|
1 July 1782 |
- |
| of Massereene (Earldom) |
Clotworthy Skeffington - Fri 16th Jul 1756
|
25 February 1816 |
- |
| Massereene (Viscountcy) |
John Clotworthy - Sun 21st Nov 1660
|
- |
- |
| Massy (Barony) |
Hugh Massy - Sun 4th Aug 1776
|
- |
- |
| Maule (Viscountcy) |
William Maule - Thu 2nd May 1743
|
4 January 1782 |
- |
| Maynard (Barony) |
William Maynard - Sat 30th May 1620
|
30 June 1775 |
- |
| Mayo (Viscountcy) |
Theobald Bourke - Mon 21st Jun 1627
|
12 January 1767 |
- |
| of Mayo (Earldom) |
John Bourke - Fri 24th Jun 1785
|
- |
- |
| Mayo (Viscountcy) |
John Bourke - Sat 13th Jan 1781
|
- |
- |
| of Meath (Earldom) |
William Brabazon - Fri 16th Apr 1627
|
- |
- |
| Melbourne (Viscountcy) |
Peniston Lamb - Thu 11th Jan 1781
|
29 January 1853 |
- |
| Melbourne (Barony) |
Peniston Lamb - Thu 28th Jun 1770
|
29 January 1853 |
- |