Former Owner
- Lambertus Eerens1
- Latham family1
- Lathrop C. Harper, Inc.1
- Lathrop Colgate Harper1
- Laurence Kirby1
- Leo Olschki1
- Librairie Damascène Morgand1
- Libri, Edoardo, active 20th century1
- Linda Ehrsam Voigts1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis XIV of France1
- Marcantonio V Borghese1
- Marchese Porri-Carcani1
- Margaret F. Woodward1
- Margaret Le Seigneur1
- Margaret of Croy1
- Margareta van der Dycke1
- Margaretha van Cleyburg1
- Marguerite de Belleville1