Former Owner
- Leonardo Loredan1
- Leonardus Martinotius1
- Leonhardus Cuntius1
- Lepeletier de Rosanbo1
- Leslie Hindman1
- Lew David Feldman1
- Librairie Damascène Morgand1
- Librairie Tross1
- Library of the Dominicans of Paris1
- Libreria la Bibliofila1
- Lionel Tollemache, 4th Earl of Dysart1
- Lisa Norris Elkins1
- Little family1
- Llanthony Priory1
- Lodi Cathedral1
- Lodovicus Saltariellus1
- Loftus Bland1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis II, Count of Flanders1