Name
- Cibo, Nicolò, Archbishop of Arles1
- Clement IX, Pope1
- Clement XI, Pope1
- Coiffier de Ruzé, Henri, Marquis de Cinq Mars1
- Colloredo, Rudolf Joseph, Count, Imperial Vice-Chancellor1
- Collotes de Jantillet, Alexius1
- Commonwealth, England1
- Conejero, Miguel, of Marchena1
- Conti, Giovanni Nicolo, Cardinal, Bishop of Ancona1
- Cordeses, Antonio, Padre, Jesuit1
- Cordova, Gomez Suarez, 1st Duke of Feria, diplomat, c 1520-15711
- Costa, Caietano Antonio da1
- Cous y Solarses, Sebastiao1
- Coutinho, Gastao, Alcayde mór of Torres Vedras1
- Coutinho, Joze Luis, Chief Judge at Goa1
- Crato, Antonio, Grand Prior of, self-styled King of Portugal1
- Cueillete, Jehan, Secretary to Louis XII1
- Cunha d'Ataide, Francisco Luis da1
- Cunha d'Ataide, Nuno da, Cardinal, Portuguese Secretary of State, Inquisitor-General of Portugal1
- Cunha, Rodrigo da, Archbishop of Lisbon1