Former Owner
- Manuel John Johnson1
- Marcantonio Contarini1
- Marianne F. ???1
- Mark Augspürger1
- Mark Sittich von Hohenems Altemps1
- Markus Fugger1
- Mary Schell Collins1
- Mary Talbot, Countess of Shrewsbury1
- Mary W. T. Dickinson1
- Michiel family1
- Mortimer Loeb Schiff1
- Muḥammad Bāqir Shīrāzī1
- Muḥammad Ḥusayn ibn Jaʻfar Qulī1
- Nicholas N. Martinovitch1
- Nicolas Moreau1
- Oliver Henry Perkins1
- Oliver R. Barrett1
- Otto Jahn1
- Otto Orren Fisher1
- P. Desq1