| Blyth (Barony) |
James Blyth - Fri 19th Jul 1907
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| Blythswood (Barony) |
Archibald Campbell Campbell - Wed 24th Aug 1892
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14 September 1940 |
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| Bolingbroke (Viscountcy) |
Henry St John - Thu 7th Jul 1712
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- |
- |
| Bolsover (Barony) |
Augusta Mary Elizabeth Cavendish-Bentinck - Fri 23rd Apr 1880
|
21 March 1977 |
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| Bolton (Barony) |
Thomas Orde Powlett - Fri 20th Oct 1797
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- |
- |
| Boringdon (Barony) |
John Parker - Tue 18th May 1784
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- |
- |
| Borodale (Viscountcy) |
David Beatty - Sat 27th Sep 1919
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- |
- |
| Borthwick (Lordship) |
William Borthwick
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| Borwick (Barony) |
Robert Hudson Borwick - Thu 20th Jul 1922
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- |
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| Boston (Barony) |
William Irby - Fri 10th Apr 1761
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- |
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| Boteler (Barony) |
John Boteler - Sun 30th Jul 1628
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| Botetourt (Barony) |
No Letters Patent
|
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| Botreaux (Barony) |
No Letters Patent
|
- |
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| Bottesford (Barony) |
Charles Manners Sutton - Tue 10th Mar 1835
|
26 February 1941 |
- |
| Boyd of Merton (Viscountcy) |
Alan Tindal Lennox-Boyd - Thu 8th Sep 1960
|
- |
- |
| Boyd-Orr (Barony) |
John Boyd-Orr - Wed 9th Mar 1949
|
25 June 1971 |
- |
| Boyle of Kelburn, Stewartoun, Cumbrae, Finnick, Largs and Dalry (Lordship) |
David Boyle - Sat 31st Jan 1699
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| Brabazon of Tara (Barony) |
John Theodore Cuthbert Moore-Brabazon - Mon 27th Apr 1942
|
- |
- |
| Brabourne (Barony) |
Edward Hugessen Knatchbull-Hugessen - Wed 26th May 1880
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- |
- |
| Bracken (Viscountcy) |
Brendan Bracken - Mon 7th Jan 1952
|
8 August 1958 |
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