Peerages

By title: O

All peerages

Navigate via first letter of Title

Title Letters patent Extinct Merged into crown
O'Grady (Barony) Standish O'Grady - Thu 6th Jan 1831 - -
O'Grady of Upper Holloway (Barony) Frances Lorraine Maria O'Grady - Fri 9th Dec 2022 - -
O'Hagan (Barony) Thomas O'Hagan - Tue 14th Jun 1870 - -
Oliver of Aylmerton (Barony) Peter Raymond Oliver - Fri 31st Jan 1986 17 October 2007 -
Olivier (Barony) Sydney Haldane Olivier - Sat 9th Feb 1924 15 February 1943 -
Olivier (Barony) Laurence Kerr Olivier - Fri 5th Mar 1971 11 July 1989 -
O'Loan (Barony) Nuala Patricia O'Loan - Fri 11th Sep 2009 - -
O'Neill (Earldom) Charles Henry O'Neill - Thu 28th Aug 1800 - -
O'Neill (Barony) John O'Neill - Fri 25th Oct 1793 - -
O'Neill (Barony) William O'Neill - Sat 18th Apr 1868 - -
O'Neill (Viscountcy) John O'Neill - Sat 3rd Oct 1795 - -
O'Neill of Bengarve (Barony) Onora Sylvia O'Neill - Thu 25th Feb 1999 - -
O'Neill of Bexley (Barony) Teresa Ann Jude O'Neill - Mon 7th Nov 2022 - -
O'Neill of Clackmannan (Barony) Martin John O'Neill - Tue 14th Jun 2005 26 August 2020 -
O'Neill of Gatley (Barony) Terence James O'Neill - Thu 28th May 2015 - -
O'Neill of the Maine (Barony) Terence Marne O'Neill - Fri 23rd Jan 1970 12 June 1990 -
Ongley (Barony) Robert Henley Ongley - Tue 30th Jul 1776 - -
of Onslow (Earldom) George Onslow - Fri 19th Jun 1801 - -
Onslow (Barony) Richard Onslow - Fri 19th Jun 1716 - -
Onslow of Woking (Barony) Cranley Gordon Douglas Onslow - Fri 31st Oct 1997 13 March 2001 -