Former Owner
- Melk Abbey2
- Menaḥem Naḥum, ha-Leṿi, mi-ḳ.ḳ. Dribin1
- Merlemont family1
- Meschatin La Faye family1
- Messieurs Du Trieu2
- Michael Greenberg4
- Michael Kantakouzenos Şeytanoğlu1
- Michael Tomkinson2
- Michael Wodhull1
- Michel Chasles1
- Michel Ferdinand d'Albert d'Ailly1
- Michel Guibé1
- Michel de Léon1
- Michele Amari1
- Michele Cavaleri2
- Michiel family1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Miguel de Mayora1
- Mikhail Golitsyn2
- Millard Meiss1