Former Owner
- Mary Stanley, Countess of Derby1
- Mary Talbot, Countess of Shrewsbury1
- Mary W. T. Dickinson9
- Mary, Queen of Scots1
- Marymount College, Tarrytown4
- Matteo Barresi1
- Matteo Luigi Canonici7
- Matthaeus Lupin1
- Matthew Bloxam1
- Matthew Hale1
- Matthias Corvinus1
- Maurice Johnson1
- Maurice Kann1
- Maxwell Sommerville1
- Mayer Sulzberger1
- Mayfair Rare Books and Manuscripts1
- Melchior Daniel Neubronner1
- Melk Abbey2
- Menaḥem Naḥum, ha-Leṿi, mi-ḳ.ḳ. Dribin1
- Merlemont family1