Former Owner
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Lane Theological Seminary1
- Latham family1
- Laurence Hilliard1
- Laurence Kirby1
- Laurence Vaux1
- Laurent Campagne1
- Laurentius van der Torqel1
- Law Society1
- LeMare1
- Legoué1
- Lehn of Denmark1
- Leonard Grey, 1st Viscount Grane1
- Lepeletier de Rosanbo1
- Leslie Hindman1
- Lew David Feldman1
- Librairie Damascène Morgand1
- Library of the Dominicans of Paris1
- Libri, Edoardo, active 20th century1