Former Owner
- Marcela Gabriela1
- Margaret F. Woodward1
- Marguerite de Fontenay1
- Marie Ange-Toussaint Placide de Ferron1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1
- Marino Grimani1
- Mariota Lyle1
- Martinus Nijhoff1
- Maurice Kann1
- Maxwell Sommerville1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Minerva Kaiser1
- Minnis, Katherine1
- Monsieur de Bel Air1
- Muriel Agnes Fry1
- N. Pauli1
- Nicolas Antoine Labbey de Billy1
- Nicolas Rauch1