Former Owner
- Jean Baptiste Verdussen1
- Jean Budé1
- Jean Marie Michel Gasparoli1
- Jeanne Françoise Maclovie de Carman1
- Jeanne Govro1
- Jesuit College of San Bartolomeo1
- Johann Heinrich van Ess1
- John Bulkeley1
- John D. McKenna1
- John F. Fleming1
- John Henry Ellis1
- John Henry Gurney Jr.1
- John Hope, 1st Marquess of Linlithgow1
- John Morgan1
- John Patteson1
- John Ruskin1
- John Singer Sargent1
- Joseph Whitney1
- Julius Hess1
- Kartause Erfurt1