Name
- Bülow, Heinrich, Baron, Prussian Foreign Minister1
- Caldeira Brant Pontes, Felizberto, Marquês de Barbacena; Brazilian diplomatist1
- Capelle, Guillaume Antoine Benoit, Baron1
- Capo d'Istria, Giovanni Antonio, Count President of Greece1
- Capo d'Istria, Viaro, Count, brother of Count Giovanni Antonio Capo d'Istria1
- Carrillo de Albornoz y Montiel, José, Conde de Trastamára; Duque de Montemar 18261
- Cartwright, of London1
- Castro, Elizabeth, widow of - de Castro, Brazilian physician1
- Cavendish, William George Spencer, 6th Duke of Devonshire, Whig politician, 1790-18581
- Cetto, August, Baron, Bavarian Minister in London1
- Chernyshev, Aleksandr Ivanovich, Prince, Russian general and statesman1
- Chichagov, Pavel Vasilievich, Russian admiral1
- Child-Villiers, George, 5th Earl of Jersey1
- Christie, James, the younger, antiquary and auctioneer1
- Cockburn, George, 8th Baronet, naval officer, 1772-18531
- Cordoba, Antonio, Spanish diplomatist1
- Coster, Charles du, commission agent, of Naples1
- Couvreur van Maldeghem, L. J., Belgian representative in London1
- Curtis, William, 1st Baronet, banker and politician, 1752-18291
- Cutlers and Wilson, wine merchants, London1