Name
- Campbell, Archibald, 3rd Duke of Argyll1
- Campion, Henry1
- Capell, William, 3rd Earl of Essex 17101
- Cardevac, Louis, marquis d'Havrincourt, French Ambassador in Sweden1
- Carmichael, John, 3rd Earl of Hyndford, diplomatist1
- Carpenter, Robert, Captain1
- Carrillo de Albornoz, José, Conde de Montemar1
- Carteret, John, 2nd Baron Carteret, afterwards 1st Earl Granville; Secretary of State; Lord Lieutenant of Ireland1
- Cason, John1
- Castelar, Marquis del, Spanish Ambassador in France1
- Castiglioni, Marquise de1
- Castres, Abraham, Consul-General at Madrid, and Envoy to Portugal1
- Cathcart, Charles Schaw, 9th Baron Cathcart, army officer and ambassador, 1721-17761
- Cecil, Emily Mary, wife of James, 1st Marquess of Salisbury1
- Chadwicke and Tooke, Messrs, Smyrna1
- Chamillart, Louis Michel, Comte de la Suze1
- Charlotte Florentina, Countess of Waldeck and Pyrmont1
- Chavigny, Théodore, French Minister at the diet at Ratisbon, and in Italy, Spain, England, etc1
- Cholmondeley, George James, Commissioner of Excise1
- Cibo, Ricciarda, Duchessa di Massa1