Former Owner
- Madyan Qusuni1
- Malachia Ormanian1
- Margaret Barclay Wilson1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Marienstiftsgymnasium1
- Mary Lusher1
- Mayer Sulzberger1
- Mazliah Finzi1
- Medingen Abbey1
- Michael Greenberg1
- Monastero di Santo Spirito in Verona1
- Monastery at San Gregorio al Celio1
- Morell Thurston1
- Moritz Dessauer1
- Muḥammad Dhará1
- Muḥammad Riz̤ā1
- Muḥammad ibn Jaʻfar Yaḥyá1
- Muḥammad Ṣadr al-Dīn1
- Muṣṭafa Ṣidḳī1