Former Owner
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1
- Marie-François Duchesne de Beaumanoir1
- Marino Grimani1
- Mariota Lyle1
- Martinus Nijhoff1
- Marvin-L. Colker1
- Mathias Schurer1
- Matteo Barresi1
- Matteo Luigi Canonici1
- Matthew Simpson Parkhurst1
- Matthias Corvinus1
- Maurice Kann1
- Maxwell Sommerville1
- Mayer Sulzberger1
- Mayfair Rare Books and Manuscripts1
- Maḥmūd bin Nāṣir1
- Melk Abbey1
- Meschatin La Faye family1
- Michael Kantakouzenos Şeytanoğlu1
- Michael Wodhull1