| Mountcashell (Viscountcy) |
Stephen Moore - Wed 22nd Jan 1766
|
1 April 1915 |
- |
| Mountcashell (Earldom) |
Stephen Moore - Fri 5th Jan 1781
|
1 April 1915 |
- |
| Mount Earl (Viscountcy) |
Valentine Richard Quin - Sat 3rd Feb 1816
|
25 March 2011 |
- |
| Mountjoy (Viscountcy) |
Luke Gardiner - Wed 30th Sep 1795
|
25 May 1829 |
- |
| Mountmorres (Viscountcy) |
Hervey Morres - Wed 29th Jun 1763
|
- |
- |
| of Mountnorris (Earldom) |
Arthur Annesley - Tue 3rd Dec 1793
|
23 July 1844 |
- |
| Newcomen (Viscountcy) |
Charlotte Gleadowe-Newcomen - Fri 11th Feb 1803
|
15 January 1825 |
- |
| of Norbury (Earldom) |
John Toler - Sat 23rd Jun 1827
|
- |
- |
| of Normanton (Earldom) |
Charles Agar - Tue 4th Feb 1806
|
- |
- |
| Northland (Viscountcy) |
Thomas Knox - Mon 4th Jul 1791
|
- |
- |
| Nugent (Earldom) |
Robert Nugent - Sun 21st Jul 1776
|
26 March 1889 |
- |
| O'Neill (Earldom) |
Charles Henry O'Neill - Thu 28th Aug 1800
|
25 March 1841 |
- |
| O'Neill (Viscountcy) |
John O'Neill - Sat 3rd Oct 1795
|
12 February 1855 |
- |
| of Ormond (Dukedom) |
James Butler - Wed 30th Mar 1661
|
17 December 1758 |
- |
| of Ormond (Marquessate) |
James Butler - Sat 30th Aug 1642
|
17 December 1758 |
- |
| of Ormond (Marquessate) |
Walter Butler - Fri 12th Jan 1816
|
10 August 1820 |
- |
| of Ormond (Marquessate) |
James Wandesford Butler - Wed 5th Oct 1825
|
25 October 1997 |
- |
| of Orrery (Earldom) |
Roger Boyle - Sun 5th Sep 1660
|
- |
- |
| Orwell (Viscountcy) |
Francis Vernon - Sun 21st Jul 1776
|
15 October 1783 |
- |
| Oxmantown (Viscountcy) |
Laurence Harman Harman - Fri 2nd Oct 1795
|
20 April 1807 |
- |