Former Owner
- C Traylen Bookshop1
- C. Duca Visconti Modrone1
- C.B1
- Carl Hermann Grabauer1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1
- Caxton Club1
- Charles Brodrick1
- Charles Ede1
- Charles Golding1
- Charles Stephen Ascherson1
- Charles V. Wheeler1
- Charles-Benoit de Campigny1
- Charlier de Namur1
- Chasseigne family1
- Chiswick Book Shop1
- Christian Gottlieb Schwarz1
- Christophorus de Stinglhaim1
- Château d'Anet1
- Clarence S. Bement1
- Claude d'Urfé1