Former Owner
- Mayer Sulzberger1
- Mazliah Finzi1
- Melk Abbey1
- Michael Bernays1
- Michel Chasles1
- Michel de Léon1
- Mitchell Starrett Buck1
- Moritz Dessauer1
- Moritz Joseph Johann von Dietrichstein1
- Mortimer Frank1
- Morton Parker Eden1
- Muhammed Ali Khan Wallajah1
- Mullā ʻAbbās Zīvarī1
- Mushtaq Ali Khan I of Rampur1
- Muḥammad Amīn ʻAṭṭār1
- Muḥammad Bāqir1
- Muḥammad Bāqir Shīrāzī1
- Muḥammad Darvīsh Nūr al-Dīn Sunbulī1
- Muḥammad Jaʻfar1
- Muḥammad Sabzavārī1