Former Owner
- Charles Stuart, 1st Baron Stuart de Rothesay2
- Chintamani Misra1
- Cintāmaṇabhaṭṭa Guṇe1
- Clarence Howard Clark, Sr.2
- Clarence S. Bement2
- Claude Bourelier1
- Coella Lindsay Ricketts6
- Collegium Germanicum et Hungaricum1
- Cologne Charterhouse2
- Corp. Thomas Tay1
- Count Johann Nepomuk Wilczek1
- Cox Macro1
- Cyrus Longworth Lundell1
- D. Andreas Parisino1
- D. D. Horatius Bosner1
- Dahīʹzādah1
- Damiano Muoni1
- Daniel B. Fearing1
- Daniel Itzig1
- Darvīsh Asʻad ibn ʻAbd al-Karīm ʻArab1