Former Owner
- James Rathwell Page1
- Jan Six VII1
- Jean Budé1
- Jean Felix Dénie1
- Jean de Goix1
- Jeanne Govro1
- Jeanne de Goix1
- Joachim Guerrinus de Montefegatesio1
- Joannes Salzperg1
- Johannes Wigg1
- John C. Jackson1
- John Harvey Treat1
- John Henry Ellis1
- John Roland Abbey1
- John Ruskin1
- John William Harshberger1
- Joseph Pope1
- Kloster Bredelar1
- Laurentius van der Torqel1
- Louis Charles Elson1