Former Owner
- Judah ben Moses, ha-Rofe, ha-Kohen1
- Julius Hess1
- Jérôme Bignon1
- K. B. Starkie1
- Kloster Rebdorf1
- Konrad von Maurer1
- Kulturhistorisches Museum Magdeburg1
- Lajos Graf Apponyi de Nagy-Appony1
- Latham family1
- Lathrop C. Harper, Inc.1
- Laurence William Hodson1
- Laurentius van der Torqel1
- Leigh Baker1
- Libreria antiquaria Mediolanum1
- Libri, Edoardo, active 20th century1
- Liechtenstein State Library1
- Lionel Tollemache, 4th Earl of Dysart1
- Llanthony Priory1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Loftus Bland1