Name
- Campo y Pérez de la Serna, Bernardo del, Marquis del Campo, Spanish Ambassador to Great Britain1
- Cantwell, Andrew, of Paris; physician1
- Capel, William Anne Holles, 4th Earl of Essex1
- Cerretesi, Joseph, at Venice1
- Champigny, Jean de, Colonel Chevalier1
- Charles Christian, Prince of Nassau-Weilburg1
- Charles Emmanuel III, Duke of Savoy, King of Sardinia, 1701-1773, http://isni.org/isni/000000... http://viaf.org/viaf/623505291
- Charles Frederick, Margrave of Baden-Durlach, 1728-18111
- Charles William Ferdinand, Duke of Brunswick-Lüneburg-Wolfenbü... of Add MS 407591
- Christian, Edward, Secretary to Lord Danby1
- Christian, Thomas1
- Clavering, John, Knight, army officer and councillor in India, ? 1722-17771
- Clavering-Cowper, George Nassau, 3rd Earl Cowper1
- Clotworthy, Skeffington, 2nd Earl of Massereene1
- Cobenzl, Johann Karl Philipp, Count, Imperial diplomatist1
- Colepeper, Thomas, Colonel; of Egerton MS 33521
- Colonna de Bozzi, Antonio Francesco, Conte; Corsican plenipotentiary1
- Conti, Girolamo Alberti1
- Cornabé, Francis, Major-General; Envoy of the Princess of Orange to Brussels1
- Corry, Trevor, British Consul at Danzig1