| David Anthony Llewellyn Owen |
Owen, of the City of Plymouth (Barony) |
Tue 30th Jun 1992 |
|
| Stanley Orme |
Orme, of Salford in the County of Greater Manchester (Barony) |
Tue 21st Oct 1997 |
Thu 28th Apr 2005 |
| Onora Sylvia O'Neill |
O'Neill of Bengarve, of The Braid in the County of Antrim (Barony) |
Thu 25th Feb 1999 |
|
| Ernest Ronald Oxburgh |
Oxburgh, of Liverpool in the County of Merseyside (Barony) |
Tue 27th Jul 1999 |
|
| Matthew Alan Oakeshott |
Oakeshott of Seagrove Bay, of Seagrove Bay in the County of Isle of Wight (Barony) |
Mon 1st May 2000 |
|
| Herman George Ouseley |
Ouseley, of Peckham Rye in the London Borough of Southwark (Barony) |
Tue 26th Jun 2001 |
|
| Martin John O'Neill |
O'Neill of Clackmannan, of Clackmannan in Clackmannanshire (Barony) |
Tue 14th Jun 2005 |
Wed 26th Aug 2020 |
| Nuala Patricia O'Loan |
O'Loan, of Kirkinriola in the County of Antrim (Barony) |
Fri 11th Sep 2009 |
|
| Jonathan Oates |
Oates, of Denby Grange in the County of West Yorkshire (Barony) |
Mon 5th Oct 2015 |
|
| John Foster |
Oriel, of Ferrard in the County of Louth (Barony) |
Tue 17th Jul 1821 |
Sat 23rd Aug 1828 |
| Thomas Henry Skeffington |
Oriel, of Ferrard in the County of Louth (Barony) |
Sat 23rd Aug 1828 |
Wed 18th Jan 1843 |
| John Skeffington |
Oriel, of Ferrard in the County of Louth (Barony) |
Wed 18th Jan 1843 |
Tue 28th Apr 1863 |
| John Clotworthy Talbot Foster Whyte-Melville Skeffington |
Oriel, of Ferrard in the County of Louth (Barony) |
Fri 20th Jul 1956 |
Sun 27th Dec 1992 |
| John David Clotworthy Whyte-Melville Skeffington |
Oriel, of Ferrard in the County of Louth (Barony) |
Sun 27th Dec 1992 |
|
| Clothworthy John Eyre Skeffington |
Oriel, of Ferrard in the County of Louth (Barony) |
Tue 28th Apr 1863 |
Mon 26th Jun 1905 |
| Algernon William John Clotworthy Skeffington |
Oriel, of Ferrard in the County of Louth (Barony) |
Mon 26th Jun 1905 |
Fri 20th Jul 1956 |
| Cranley Gordon Douglas Onslow |
Onslow of Woking, of Woking in the County of Surrey (Barony) |
Fri 31st Oct 1997 |
Tue 13th Mar 2001 |
| Martha Otito Osamor |
Osamor, of Tottenham in the London Borough of Haringey and of Asaba in the Republic of Nigeria (Barony) |
Mon 26th Nov 2018 |
|
| Terence James O'Neill |
O'Neill of Gatley, of Gatley in the County of Greater Manchester (Barony) |
Thu 28th May 2015 |
|
| Hendrie Dudley Oakshott |
Oakshott, of Bebington in the County Palatine of Chester (Barony) |
Fri 21st Aug 1964 |
Sat 1st Feb 1975 |