Former Owner
- John Ruskin1
- Joseph Anton Koch1
- Joseph Whitney1
- Joseph-Félix Allard1
- José Antonio Conde1
- Juan de Gayferos de Eguiraum1
- Julie Florence de Cossette1
- Julius Hess1
- Jérôme Bignon1
- Katheline Minnis1
- Kloster Bredelar1
- Lathrop C. Harper, Inc.1
- Laurentius van der Torqel1
- Libreria la Bibliofila1
- Loftus Bland1
- Louis César de La Baume Le Blanc1
- Louis II, Count of Flanders1
- Lucien Magne1
- Luigi Celotti1
- Léon Gruel1