Name
- Bett, Dorothée, wife of Augustine Ambroise de, Marquis de Lede1
- Caetano, Gaetano Francesco, Duke of Sermonetta1
- Capissucchi, Raimondo, Cardinal1
- Carafa, Fortunato, Cardinal1
- Carpegna, Gaspare, Cardinal 16701
- Caryll, Family1
- Caryll, Mary, Abbess of the English Benedictine Nunnery at Dunkirk1
- Caryll, Richard, of West Grinstead1
- Cavalieri, Gasparo de', Cardinal1
- Chaillot Nunnery, France1
- Charles Emmanuel II, of Savoy1
- Charles II, of Spain, 1661-17001
- Chigi, Flavio, Cardinal 16571
- Christian V, of Denmark, 1646-16991
- Cibo, Alderano, Cardinal 1645, Secretary of State 16761
- Cibo, Carlo, Duca di Massa1
- Ciceri, Carlo Steffano, Cardinal1
- Cloche, Antonin, Master General of the Dominicans1
- Codebeau, -, correspondent of John Caryll, fl 16871
- Colloredo, Leandro, Cardinal 16811