- Cook, John, -approximately 13681
- Cook, Margaret Hoskin, -approximately 13681
- Coppetti, Coppetto1
- Coppetti, Coppo1
- Copybooks6
- Copyists1
- Corbinelli, Bernardo1
- Corbinelli, Girolamo1
- Corbinelli, Pandolfo1
- Cornelio, Giovanni1
- Corporation law (Islamic law)1
- Correspondence27
- Correspondence (Cyprian, Saint, Bishop of Carthage)1
- Correspondence (Namık Kemal)1
- Corró de Munt (Spain)1
- Corsini, Bartolomeo1
- Corsino, Pietro di1
- Cortesi, Girolamo1
- Cortigiani, Giovanni1
- Cosimo I, Grand-Duke of Tuscany, 1519-15745