Parentless Concepts
- Capello, Marcantonio
- Capitano Draghi
- Caramanzel
- Cardano, Girolamo
- Cardianus, Hieronymus
- Carlo Emanuele I
- Carolo Magno
- cartographic material
- Casaubon, Isaac
- Caspar Schoppe, Scaliger Hypobolimaeus hoc est elenchus epistolarum Josephi Burdonis pseudo Scaligeri
- Castilian
- Catalogi duo librorum Arabicorum ac Syriacorum bibliothecae tum Bavaricae, tum Vaticanae
- Catalogue of the Vatican Library
- Catalogum librorum Arabicorum Scaligeri
- Catalogum librorum Graecorum (Vienna)
- Catalogus Francofurti
- Catalogus librorum Arabicorum Bibliothecae Bavaricae MSS
- Catharina
- Cathologum libroum Constantinopoli venalium manuscriptorum in linguis Graeca, Syra, Hebraica, Arabica, Persica, Turcica vel Chaldaica
- Cauler, Simon
- Cavellat
- Cavellat, Guillaume
- Cavellat, Pierre
- Cavellatus, Petrus
- Cayet, Pierre Victor