Former Owner
- Carl Alphons Geigy-Hagenbach1
- Carl Reinhardt4
- Carleton Rubira Richmond1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1
- Carlo Longland1
- Carlo Morbio3
- Carlos José Gutiérrez de los Ríos y Rohan Chabot Fernán-Núñez1
- Caspar René Gregory1
- Catherine Conduitt3
- Cecil Deedes1
- Charles Augustus Stoddard1
- Charles Burr2
- Charles D. Humberd2
- Charles Edwin Puckett1
- Charles F. Gunther3
- Charles Fairfax Murray1
- Charles Golding1
- Charles Joseph Harford1
- Charles Seymour, 6th Duke of Somerset1
- Charles Stephen Ascherson1