Former Owner
- Joseph-Félix Allard1
- José Antonio Conde1
- Juan de Gayferos de Eguiraum1
- Julius Hess1
- Jérôme Bignon1
- Kenneth Hyde1
- Kloster Bredelar1
- Lane Theological Seminary1
- Lathrop C. Harper, Inc.1
- Laurentius van der Torqel1
- Leo Olschki1
- Leonard Grey, 1st Viscount Grane1
- Libreria la Bibliofila1
- Libri, Edoardo, active 20th century1
- Louis César de La Baume Le Blanc1
- Louis II, Count of Flanders1
- Lucien Magne1
- Luigi Arrigoni1
- Luigi Celotti1
- Léon Gruel1