Former Owner
- John Patteson1
- John Swyntoun1
- Joseph Anton Koch1
- Joseph Barrois20
- Joseph-Félix Allard1
- José Antonio Conde1
- Jérôme Bignon1
- Katherine Somerset Wyttenbach Fenwick1
- Kloster Bredelar1
- Lathrop C. Harper, Inc.1
- Laurence Claiborne Witten II1
- Laurentius van der Torqel1
- Leigh Baker1
- Leo S. Olschki Editore1
- Libreria antiquaria Mediolanum1
- Libreria la Bibliofila2
- Libri, Edoardo, active 20th century1
- Loftus Bland1
- Louis II, Count of Flanders1
- Ludwig Rosenthal's Antiquariaat1