Former Owner
- Lutheran Theological Seminary at Philadelphia1
- Madyan Qusuni1
- Maggs Bros Ltd2
- Manoel Pereira da Sylva1
- Manuel Fernández del Castillo1
- Manuel John Johnson1
- Marcantonio Contarini1
- Mark Augspürger1
- Markus Fugger1
- Mary Schell Collins1
- Mary Talbot, Countess of Shrewsbury1
- Mary W. T. Dickinson1
- Michiel family1
- Milton Fischmann4
- Morris Jastrow, Jr.1
- Mortimer Loeb Schiff1
- Muḥammad Bāqir Shīrāzī1
- Muḥammad Ḥusayn ibn Jaʻfar Qulī1
- Nicholas N. Martinovitch1
- Nicolas Moreau1