Former Owner
- London School of Jewish Studies1
- Lorenzo Antonio da Ponte1
- Louis Bourguet1
- Lucien Magne1
- Luigi Clerici1
- Luigi Cora1
- Marcantonio V Borghese1
- Marcela Gabriela1
- Marchese Porri-Carcani1
- Marco Antonio Morosini1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Mario Maffei1
- Martin Breslauer1
- Matteo Barresi1
- Mazliah Finzi1
- Mercantile Library Company1
- Michael Greenberg1
- Michael Tomkinson1
- Michel Chasles1