Former Owner
- James C. Byrne5
- James Elwin Millard1
- James Halliwell-Phillipps1
- James Lyell1
- James Russell Lowell1
- Jean Jules Olinger1
- Joachim Guerrinus de Montefegatesio2
- Joachim Windhag1
- Joannes Salzperg1
- Johann Egolph1
- Johann Heinrich van Ess11
- Johannes Abezier1
- Johannes Wesbach1
- Johannes de Helb1
- Johem Spiess1
- John A. Murphy1
- John Eliot Hodgkin2
- John Fletcher Hurst1
- John Frederick Lewis34
- John Harvey Treat1