Former Owner
- Michel Ferdinand d'Albert d'Ailly1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Milton Fischmann10
- Monastero di Santo Spirito in Verona1
- Monastery at San Gregorio al Celio1
- Monastery of San Bartolmeo, Arezzo, Tuscany1
- Moritz Dessauer1
- Morris Jastrow, Jr.1
- Nanna Corbinello1
- Nathaniel Sherman Bouton1
- New York Academy of Medicine7
- Nicholai von Bodeck1
- Nicolas Antoine Labbey de Billy1
- Novalesa Abbey1
- Noël Pinelli1
- Ohio State University Center for Epigraphical and Palaeographical Studies1
- Oliver Henry Perkins1
- Oliver R. Barrett2
- Otto Ege30
- Paolo Gallo1