Peerages

By title: O

All peerages

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Title Letters patent Extinct Merged into crown
Oakeshott of Seagrove Bay (Barony) Matthew Alan Oakeshott - Mon 1st May 2000 - -
Oakley (Barony) George Cadogan - Sat 10th Sep 1831 - -
Oaksey (Barony) Geoffrey Lawrence - Mon 13th Jan 1947 - -
Oakshott (Barony) Hendrie Dudley Oakshott - Fri 21st Aug 1964 1 February 1975 -
Oates (Barony) Jonathan Oates - Mon 5th Oct 2015 - -
O'Brien (Barony) Murrough O'Brien - Wed 21st Oct 1654 3 July 1855 -
O'Brien (Barony) Peter O'Brien - Sat 16th Jun 1900 7 September 1914 -
O'Brien of Lothbury (Barony) Leslie Kenneth O'Brien - Wed 14th Mar 1973 24 November 1995 -
O'Cathain (Barony) Detta O'Cathain - Fri 21st Jun 1991 23 April 2021 -
Ockham (Viscountcy) William King - Sat 30th Jun 1838 31 January 2018 -
Ockingham (Barony) George - Wed 6th Apr 1689 28 October 1708 -
O'Donnell (Barony) Augustine Thomas O'Donnell - Tue 10th Jan 2012 - -
of Offaly (Earldom) James Fitzgerald - Thu 19th Mar 1761 - -
Offord of Garvel (Barony) Malcolm Ian Offord - Wed 13th Oct 2021 - -
Ogilvy of Airlie (Lordship) James Ogilvy - Thu 28th Apr 1491 - -
Ogilvy of Cullen (Lordship) James Ogilvy - Tue 24th Jun 1698 - -
Ogilvy of Deskford and Cullen (Lordship) James Ogilvy - Fri 24th Jun 1701 - -
Ogle (Viscountcy) William Ogle - Sat 23rd Dec 1645 14 July 1682 -
of Ogle (Earldom) William Cavendish - Mon 16th Mar 1665 26 July 1691 -
Ogmore (Barony) David Rees Rees-Williams - Mon 10th Jul 1950 - -