Former Owner
- John Morgan1
- John Shelton Lawrence1
- John Walker1
- Joseph E. Widener1
- Juan de Aillon1
- Juan de Torquemada1
- Judith Lady Montefiore College1
- Julia Burgess1
- Julie Florence de Cossette1
- Julius Hess1
- Katherine Petersen1
- Kenneth Hyde1
- Lajos Graf Apponyi de Nagy-Appony1
- Lancino Curti1
- Lathrop C. Harper, Inc.1
- Laura Hurd Motion1
- Leonardo Bruni1
- Leonardus Martinotius1
- Leonhardus Cuntius1
- Leopold Gruber1