Former Owner
- Ignatius Molitor1
- J. Palmer1
- Johannes Vivianus1
- John Frederick Lewis9
- John Henry Ellis1
- John Henry Wrenn1
- John Hinsdale Scheide1
- John Jarsey1
- John Peacock1
- John Topham1
- John Willis1
- Joseph Franz Gross1
- Juan Burgueño1
- Juan de Londono1
- Julian Burgueño1
- Jón Þorstensson1
- Kartause Erfurt1
- Konrad von Maurer2
- Law Society1
- Leo Olschki1