Former Owner
- Lathrop Colgate Harper1
- Laurence Claiborne Witten II2
- Laurence William Hodson1
- Laurent Campagne1
- Lawrence J. Schoenberg2
- LeMare1
- Legoué1
- Leo Olschki1
- Leo S. Olschki Editore2
- Lepeletier de Rosanbo1
- Librairie Damascène Morgand1
- Library of the Dominicans of Paris1
- Lisa Norris Elkins1
- Loftus Bland1
- Long Island Historical Society, Maine1
- Louis César de La Baume Le Blanc1
- Louis Hercule Timoléon de Cossé-Brissac1
- Louis II, Count of Flanders1
- Louis Jean Gaignat1
- Louis XII of France1