Name
- A'Court, William, 1st Baron Heytesbury, diplomat and politician, 1779-18601
- Abbadessa, Serafino1
- Abbot, Charles, 1st Baron Colchester, Speaker of the House of Commons, 1757-18291
- Abbott, Robert, of Add MS 349081
- Abdul Kadir Bey, Turkish Admiral6
- Abercromby, Ralph, General1
- Abu Bekr, Pasha1
- Abubekir, Vicario di Bej di S Giovanni d'Acri1
- Acton, El-1
- Acton, John Francis Edward, 6th Baronet, Lieutenant-General, Prime Minister of Naples, 1736-181120
- Adair, Charles William, Captain RM6
- Adams, James, of Add MS 349352
- Adams, John, President of the United States1
- Adamson, William, of Add MS 349141
- Addington, Henry, 1st Viscount Sidmouth, Prime Minister, 1757-18444
- Addington, John Hiley, PC, MP1
- Admiralty, 1708-19644
- Ahmed Atif, Chief Secretary to the Sultan1
- Albani, Giovanni Francesco, Cardinal, 1720-18031
- Alexander I, of Russia2