Former Owner
- Carlos José Gutiérrez de los Ríos y Rohan Chabot Fernán-Núñez1
- Cecil Deedes1
- Charles Fairfax Murray1
- Charles Joseph Harford1
- Charles Seymour, 6th Duke of Somerset1
- Charles Stephen Ascherson1
- Chintamani Misra1
- Cintāmaṇabhaṭṭa Guṇe1
- Claude Bourelier1
- Cobham, H. W., 1867-1
- Collegium Germanicum et Hungaricum1
- Count Johann Nepomuk Wilczek1
- Cox Macro1
- D. Andreas Parisino1
- D. D. Horatius Bosner1
- Dahīʹzādah1
- Damiano Muoni1
- Daniel B. Fearing1
- Daniel Itzig1
- Daniel Sperber1