Former Owner
- Laurence Kirby1
- Laurence William Hodson1
- Laurent Campagne1
- Lawrence J. Schoenberg5
- LeMare1
- Legoué1
- Leo Olschki1
- Leo S. Olschki Editore2
- Lepeletier de Rosanbo1
- Lewis L. Gould7
- Librairie Damascène Morgand2
- Library of the Dominicans of Paris1
- Lima Public Library2
- Linda Ehrsam Voigts2
- Lisa Kiser3
- Lisa Norris Elkins1
- Long Island Historical Society, Maine1
- Louis César de La Baume Le Blanc1
- Louis II, Count of Flanders1
- Louis XII of France1