Letters Patent
Navigate by the first letter of the Peerage title
By title: O
| Kingdom | Reign | Issued on | Peerage types | Peerages | Issued to |
|---|---|---|---|---|---|
| United Kingdom | Elizabeth II | Fri 30th Apr 1971 | Life peerage: Life Peerages Act 1958 | Orr-Ewing | ORR-EWING Charles Ian |
| Kingdom of Ireland | George III | Wed 7th Apr 1762 | Peerage of Ireland | Orwell | VERNON Francis |
| Kingdom of Ireland | George III | Sun 21st Jul 1776 | Promotion in the peerage of Ireland | Orwell | VERNON Francis |
| United Kingdom | Elizabeth II | Mon 26th Nov 2018 | Life peerage: Life Peerages Act 1958 | Osamor | OSAMOR Martha Otito |
| United Kingdom | Elizabeth II | Thu 1st Oct 2015 | Life peerage: Life Peerages Act 1958 | O'Shaughnessy | O'SHAUGHNESSY James Richard |
| United Kingdom | Victoria | Tue 13th Feb 1872 | Hereditary peerage | Ossington | DENISON John Evelyn |
| Kingdom of England | Charles II | Tue 24th Nov 1682 | Hereditary peerage | Ossulston | BENNET John |
| United Kingdom | Elizabeth II | Tue 26th Jun 2001 | Life peerage: Life Peerages Act 1958 | Ouseley | OUSELEY Herman George |
| United Kingdom | Victoria | Tue 5th Mar 1850 | Hereditary peerage | Overstone | LOYD Samuel Jones |
| United Kingdom | Victoria | Fri 23rd Jun 1893 | Hereditary peerage | Overtoun | WHITE John Campbell |
| United Kingdom | Elizabeth II | Tue 30th Jun 1992 | Life peerage: Life Peerages Act 1958 | Owen | OWEN David Anthony Llewellyn |
| United Kingdom | Charles III | Wed 12th Jul 2023 | Life peerage: Life Peerages Act 1958 | Owen of Alderley Edge | OWEN Charlotte Kathryn Tranter |
| United Kingdom | Elizabeth II | Tue 27th Jul 1999 | Life peerage: Life Peerages Act 1958 | Oxburgh | OXBURGH Ernest Ronald |
| United Kingdom | Victoria | Fri 13th Aug 1886 | Promotion | Oxenbridge | MONSON William John |
| United Kingdom | Victoria | Mon 16th Aug 1841 | Hereditary peerage (already peer of Scotland) | Oxenfoord | DALRYMPLE John |
| United Kingdom | George V | Mon 9th Feb 1925 | Hereditary peerage | Oxford and Asquith | ASQUITH Herbert Henry |
| Kingdom of Great Britain | Anne | Sat 23rd May 1711 | Hereditary peerage | Oxford and Mortimer | HARLEY Robert |
| Kingdom of Scotland | Charles II | Wed 19th Apr 1651 | Hereditary peerage | Oxfuird | MAKGILL James |
| Kingdom of Ireland | George III | Sat 22nd Sep 1792 | Peerage of Ireland | Oxmantown | HARMAN Laurence Harman |
| Kingdom of Ireland | George III | Fri 2nd Oct 1795 | Promotion in the peerage of Ireland | Oxmantown | HARMAN Laurence Harman |