Name
- Carosini, Agat-?, Canon1
- Carpegna, Giulio, Inquisitore di Malta1
- Caryll, John, called Lord Caryll1
- Cesarei, Francesco, Auditor of the Rota1
- Cesarini, Luigi1
- Charles III, of Spain, 1716-17881
- Chiaramonti, Gregorio Barnaba, Bishop of Tivoli, afterwards Pope Pius VII1
- Chiari, Romualdo1
- Christini, Giovanni Battista1
- Cid, Giuseppe1
- Ciotti, Paolo, Bishop Elect of Segni1
- Clement XI, Pope1
- Coleine, Luigi Maria, Governor of Cisterna1
- Colonna da Stigliano, Niccolò, Cardinal Legate of Romagna1
- Consalvi, Ercole, Cardinal, Papal Secretary of State1
- Corbacho, Miguel Garcia, Parish priest of Montello in Andalusia1
- Corneo, Padre Gaetano1
- Corsini, Neri Maria, Marquis, afterwards Cardinal1
- Darmy, Pietro, correspondent of Cardinal Henry Stuart, fl 17841
- Dessori, A M, correspondent of Cardinal Henry Stuart, fl 18061