Former Owner
- Matthias Corvinus1
- Maurice Johnson1
- Mazliah Finzi1
- Michaeliskonvent1
- Michel Chasles1
- Michele Amari1
- Miguel de Mayora1
- Millard Meiss1
- Milt Freudenheim1
- Monastery at San Gregorio al Celio1
- Moritz Dessauer1
- Morris H. Morgan1
- Morris Jastrow, Jr.1
- Muriel Agnes Fry1
- Murray Anthony Potter1
- Muḥammad Anīs Ṭālawī1
- Muḥammad Dhará1
- Muḥammad Riz̤ā1
- Muḥammad ibn Jaʻfar Yaḥyá1
- Muḥammad Ṣadr al-Dīn1