Name
- Choiseul, Renaud César, Vicomte, Envoy at Turin1
- Christian VII, King of Denmark1
- Cicciaporci, Elizabeth, nee Stuart1
- Clive, Sidney, of Add MS 355351
- Cobenzl, Johann Philipp, Count, Chancelier de Cour at Vienna1
- Cocceü, Karl Ludwig, Count1
- Codrington, Christopher, of Add MS 355361
- Constançon, H-1
- Cooper, William Hawman?1
- Cornwallis, Charles, 1st Marquess Cornwallis, army officer and politician, 1738-18051
- Corry, Trevor, British Consul at Danzig1
- Coussmaker, George, Captain1
- Coutts and Co, bankers, 1692-1
- Cozens, J-, Miss1
- Craigie, Charles, correspondent of Sir Robert Murray Keith, fl 17751
- Craufurd, Alexander, 1st Baronet1
- Craufurd, Charles Gregan, Knight, army officer and politician, 1761-18211
- Crosbie, John, Viscount Crosbie, 2nd Earl of Glandore (1781)1
- Crosse, William, of Add MS 355081
- Crousaz, L-, of Lausanne1