Former Owner
- Joseph L. Lilly1
- Joseph Whitney1
- Joseph ben Aryeh1
- José Antonio Conde1
- Juana I of Castile1
- Judah ben Moses, ha-Rofe, ha-Kohen1
- Julius Hess1
- Jérôme Bignon1
- K. B. Starkie1
- Katherine Petersen1
- Kenneth Hyde1
- Kloster Bredelar1
- Kloster Rebdorf1
- 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