Former Owner
- Boies Penrose II1
- Bonaventura Brem1
- Brayton C. Ives1
- Brian Douglas Stilwell1
- Brunori Cadamosto1
- C. Duca Visconti Modrone1
- C. W. S. Dixon1
- Caspar René Gregory1
- Cati S Thomas1
- Cecil Mallaby Firth1
- Charles Butler1
- Charles Deane1
- Charles E. Roseman Jr.1
- Charles Ede1
- Charles Lenormand du Coudray1
- Charles Spencer, 3rd Duke of Marlborough1
- Charles Spencer, 3rd Earl of Sunderland1
- Charles William Dyson Perrins1
- Charlier de Namur1
- Christiania Kathedralskoles Bibliothek1