Name
- Brunnov, Filipp Ivanovich, Baron, Russian Ambassador in London1
- Buisson, -, curator and correspondent of Sir Roderick Impey Murchison, fl 18281
- Bulwer, William Henry Lytton Earle, 1st Baron Dalling and Bulwer, politician and writer, 1801-18721
- Bunsen, Charles1
- Bunsen, Christian Carl Josias, Freiherr von Bunsen, Prussian diplomat, scholar and theologian, 1761-18601
- Bunsen, Ernest, of Add MS 461251
- Burgh, Ulick John, 1st Marquess of Clanricarde, politician, 1742-17971
- Burgoyne, John Fox, 1st Baronet, of the Army, army officer, 1782-18711
- Burnes, Alexander, Knight, political officer and explorer, 1805-18411
- Burrows, John Cordy, surgeon; Knight 18731
- Burton, Isabel, née Arundell, 1831-18961
- Butakov, Aleksei Ivanovich, Russian admiral1
- Butenev, Apollinary Petrovich, Russian diplomatist1
- Cairnes, John Elliot, political economist1
- Campbell, George Douglas, 8th Duke of Argyll, statesman, 1823-19001
- Campbell, John Frederick, 1st Earl of Cawdor1
- Campbell, John, 2nd Marquess of Breadalbane, politician and courtier, 1796-18621
- Canerini, Count, of the Imperial household at St Petersburg1
- Canning, Stratford, Viscount Stratford de Redcliffe, diplomat, 1786-18801
- Cavendish, William, 2nd Earl Of Burlington (1834) and 7th Duke of Devonshire (1858)1