Former Owner
- Bāpaṭa Kṛṣṇabhaṭa1
- Būtū ʻAbd al-Bāqī1
- C Traylen Bookshop1
- C. Bruscoli1
- C. Duca Visconti Modrone1
- C. W. S. Dixon1
- C.B1
- C.J. Spence1
- Caesareum Societatis Jesu Collegium Viennense1
- Cambrai Cathedral1
- Cambron Abbey1
- Camilla Doria Pallavicini1
- Camillo Riccio1
- Carl Alphons Geigy-Hagenbach1
- Carl Hermann Grabauer1
- Carl Reinhardt4
- Carleton Rubira Richmond1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate4
- Carlo Bonaparte1
- Carlo Francesco Frasconi1