Peerages for the Kingdom of Great Britain
By title: O
All peerages for Kingdom of Great Britain
Navigate via first letter of Title
| Title | Letters patent | Extinct | Merged into crown |
|---|---|---|---|
| Onslow (Barony) | Richard Onslow - Fri 19th Jun 1716 | - | - |
| of Orford (Earldom) | Robert Walpole - Tue 6th Feb 1742 | 2 March 1797 | - |
| of Oxford and Mortimer (Earldom) | Robert Harley - Sat 23rd May 1711 | 19 January 1853 | - |