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 | Mon 1st May 2000 | Life peerage: Life Peerages Act 1958 | Oakeshott of Seagrove Bay | OAKESHOTT Matthew Alan |
| United Kingdom | William IV | Sat 10th Sep 1831 | Hereditary peerage | Oakley | CADOGAN George |
| United Kingdom | George VI | Mon 13th Jan 1947 | Hereditary peerage | Oaksey | LAWRENCE Geoffrey |
| United Kingdom | Elizabeth II | Fri 21st Aug 1964 | Life peerage: Life Peerages Act 1958 | Oakshott | OAKSHOTT Hendrie Dudley |
| United Kingdom | Elizabeth II | Mon 5th Oct 2015 | Life peerage: Life Peerages Act 1958 | Oates | OATES Jonathan |
| United Kingdom | Victoria | Sat 16th Jun 1900 | Hereditary peerage | O'Brien | O'BRIEN Peter |
| Kingdom of Ireland | Charles II | Wed 21st Oct 1654 | Hereditary peerage subsidiary to another created by the same letters patent | O'Brien | O'BRIEN Murrough |
| United Kingdom | Elizabeth II | Wed 14th Mar 1973 | Life peerage: Life Peerages Act 1958 | O'Brien of Lothbury | O'BRIEN Leslie Kenneth |
| United Kingdom | Elizabeth II | Fri 21st Jun 1991 | Life peerage: Life Peerages Act 1958 | O'Cathain | O'CATHAIN Detta |
| United Kingdom | Victoria | Sat 30th Jun 1838 | Promotion | Ockham | KING William |
| Kingdom of England | William III and Mary II | Wed 6th Apr 1689 | Hereditary peerage subsidiary to another created by the same letters patent | Ockingham | George |
| United Kingdom | Elizabeth II | Tue 10th Jan 2012 | Life peerage: Life Peerages Act 1958 | O'Donnell | O'DONNELL Augustine Thomas |
| Kingdom of Ireland | George III | Thu 19th Mar 1761 | Hereditary peerage subsidiary to another created by the same letters patent | Offaly | FITZGERALD James |
| United Kingdom | Elizabeth II | Wed 13th Oct 2021 | Life peerage: Life Peerages Act 1958 | Offord of Garvel | OFFORD Malcolm Ian |
| Kingdom of Scotland | James IV | Thu 28th Apr 1491 | Hereditary peerage | Ogilvy of Airlie | OGILVY James |
| Kingdom of Scotland | William III | Tue 24th Jun 1698 | Hereditary peerage subsidiary to another created by the same letters patent | Ogilvy of Cullen | OGILVY James |
| Kingdom of Scotland | William III | Fri 24th Jun 1701 | Hereditary peerage subsidiary to another created by the same letters patent | Ogilvy of Deskford and Cullen | OGILVY James |
| Kingdom of Ireland | Charles I | Sat 23rd Dec 1645 | Peerage of Ireland | Ogle | OGLE William |
| Kingdom of England | Charles II | Mon 16th Mar 1665 | Hereditary peerage subsidiary to another created by the same letters patent | Ogle | CAVENDISH William |
| United Kingdom | George VI | Mon 10th Jul 1950 | Hereditary peerage | Ogmore | REES-WILLIAMS David Rees |