Former Owner
- Marie Thomas1
- Marie de Albano1
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1
- Marienstiftsgymnasium1
- Marino Grimani1
- Mark Lansburgh1
- Maurice Kann1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Miguel de Mayora1
- Milt Freudenheim1
- Minerva Kaiser1
- Minnis, Katherine1
- Monsieur de Bel Air1
- Muriel Agnes Fry1
- N. Pauli1
- Nathaniel Sherman Bouton1
- Nicholas B. Scheetz1
- Nicolas Antoine Labbey de Billy1
- Nicolas Rauch1
- Nicolaus Pol1