Former Owner
- Leonardo Lapiccirella2
- Leonardo Loredan1
- Leonardus Martinotius1
- Leonello d'Este, Marquis of Ferrara4
- Leonhardus Cuntius1
- Lepeletier de Rosanbo1
- Leslie Hindman1
- Lew David Feldman1
- Lewis L. Gould23
- Librairie Damascène Morgand1
- Librairie Tross1
- Library of the Dominicans of Paris1
- Libreria antiquaria Hoepli14
- Libreria la Bibliofila1
- Lima Public Library4
- Linda Ehrsam Voigts4
- Lionel Tollemache, 4th Earl of Dysart1
- Lisa Kiser11
- Lisa Norris Elkins1
- Little family1