Former Owner
- Johannes Wigg1
- Johannes de Helb1
- Johannes zu Reitheim1
- Johem Spiess1
- John Anderson1
- John D. Stanitz1
- John Eliot Hodgkin1
- John Fletcher Hurst1
- John Frederick Lewis25
- John James Lewis1
- John Read Dore1
- John Wright1
- Joseph Anton Koch1
- Joseph Baer & Co.1
- Joseph May Spetzler1
- Joseph Pope2
- Julia Burgess2
- Karen L. Gould2
- Karl F. Morrison1
- Kartause Erfurt1