| of Abercorn (Marquessate) |
John James Hamilton - Fri 15th Oct 1790
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- |
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| of Aberdeen and Temair (Marquessate) |
John Campbell Gordon - Sat 15th May 1915
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- |
- |
| of Abergavenny (Earldom) |
George Nevill - Mon 17th May 1784
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- |
- |
| of Abergavenny (Marquessate) |
William Nevill - Fri 14th Jan 1876
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- |
- |
| of Abingdon (Earldom) |
James Bertie - Mon 30th Nov 1682
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- |
- |
| Adbaston (Barony) |
Charles Whitworth - Sat 25th Nov 1815
|
12 May 1825 |
- |
| Addison (Viscountcy) |
Christopher Addison - Mon 2nd Jul 1945
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- |
- |
| of Ailesbury (Earldom) |
Robert Bruce - Wed 18th Mar 1665
|
10 February 1747 |
- |
| of Ailesbury (Earldom) |
Thomas Brudenell-Bruce - Mon 10th Jun 1776
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- |
- |
| of Ailesbury (Marquessate) |
Charles Brudenell-Bruce - Tue 17th Jul 1821
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- |
- |
| of Ailsa (Marquessate) |
Archibald Kennedy - Sat 10th Sep 1831
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- |
- |
| of Airlie (Earldom) |
James Ogilvy - Sat 2nd Apr 1639
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- |
- |
| Alanbrooke (Viscountcy) |
Alan Francis Brooke - Tue 29th Jan 1946
|
10 January 2018 |
- |
| Alexander of Hillsborough (Earldom) |
Albert Victor Alexander - Wed 30th Jan 1963
|
11 January 1965 |
- |
| Alexander of Tunis (Earldom) |
Harold Rupert Leofric George Alexander - Tue 11th Mar 1952
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- |
- |
| Alford (Viscountcy) |
John Cust - Mon 27th Nov 1815
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17 March 1921 |
- |
| Allendale (Viscountcy) |
Wentworth Canning Blackett Beaumont - Wed 5th Jul 1911
|
- |
- |
| Alverstone (Viscountcy) |
Richard Everard Webster - Mon 24th Nov 1913
|
15 December 1915 |
- |
| Amherst (Earldom) |
William Pitt Amherst - Tue 19th Dec 1826
|
4 March 1993 |
- |
| of Ancaster (Earldom) |
Gilbert Henry Heathcote-Drummond-Willoughby - Tue 23rd Aug 1892
|
29 March 1983 |
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