Former Owner
- Leonardo Lapiccirella2
- Leonardo Loredan1
- Leonardus Martinotius1
- Leonello d'Este, Marquis of Ferrara4
- Leonhardus Cuntius1
- Leopold Gruber2
- Lepeletier de Rosanbo1
- Leslie Hindman1
- Leslie, John (c. 1840), bookseller1
- Levi, David, active 19th century1
- Lew David Feldman2
- Lewis L. Gould25
- Librairie Damascène Morgand2
- Librairie Tross1
- Library of the Dominicans of Paris1
- Libreria antiquaria Mediolanum1
- Libreria la Bibliofila2
- Libri, Edoardo, active 20th century1
- Liechtenstein State Library1
- Lima Public Library4