Name
- Calchi, Sigismondo Maria, Barnabita1
- Calderinus, Joannes1
- Capponi, Aloysio, Cardinal, Archbishop of Ravenna1
- Carafa, Carlo, Cardinal 15551
- Castelleto, Pietro di1
- Charles Emanuel I, of Sardinia1
- Charles V, Holy Roman Emperor, 1500-1558, http://isni.org/isni/000000...1
- Chigi, Flavio, Cardinal 16571
- Chigi, Mario1
- Cibo, Family1
- Clement VIII, Pope1
- Clement XI, Pope1
- Coloma, Pedro1
- Contreras, Fernando, correspondent of Camillo de Massimi, fl 1655-16581
- Filelfo, Gian Mario, humanist, 1426-14801
- Fiordibello, Antonio, Papal Secretary, c 1510-15741
- Firmano, Cornelio, Catholic bishop, 1532-15881
- Foucquet, Jean François, Jesuit Missionary, afterwards Bishop of Eleutheropolis1
- Francesco I, Duke of Modena and Ferrara1
- Francis I, of France1