Former Owner
- Carl Reinhardt1
- Carleton Rubira Richmond1
- Cecil Deedes1
- Charles E. Roseman Jr.1
- Charles Hurleston1
- Charles Kothen1
- Charles Seymour, 6th Duke of Somerset1
- Charles Singer1
- Charles Stephen Ascherson1
- Charles Stuart, 1st Baron Stuart de Rothesay1
- Chartreuse Saint-Sixte de Rettel1
- Chasseigne family1
- Clemente Carilli1
- Coella Lindsay Ricketts1
- Coluccio Salutati1
- Count Johann Nepomuk Wilczek1
- Cristoferus Chrewczer1
- Dahīʹzādah1
- Damiano Muoni1
- Darvīsh Asʻad ibn ʻAbd al-Karīm ʻArab1