Name
- Camerata, Lorenzo, Count1
- Cantelmi, Giuseppe, Duca di Popoli, Principe di Pittorano1
- Caracciolo, Carmineo Niccolò, Prince of St Buono, Duke of Castello di Sangro1
- Caracciolo, Juan1
- Caramelli, Antonio, Abbate Camaldolense1
- Carnegie, James, 5th Earl of Southesk1
- Carpegna, Aldarico di, Prince of Carpegna1
- Carretto, Niccola del1
- Carrillo de Albornoz, José, Conde de Montemar1
- Cary, John, of Add MS 203101
- Casado, Isidro, Marquis de Monteleone, Spanish Ambassador at the Hague1
- Cavalli, Simone lgnazio1
- Cecil, James, 5th Earl of Salisbury1
- Charles Emmanuel II, of Savoy1
- Charles VI, Holy Roman Emperor1
- Charles XII, King of Sweden, 1682-17181
- Chauvirey, Marquise de Riscal d'Alègre1
- Cibo, Alderano, Cardinal 1645, Secretary of State 16761
- Cienfuegos, Alvarez, Cardinal1
- Clarke, William, of Add MS 203101