Former Owner
- John Henry Ellis1
- John Holt1
- John Ruskin1
- John Sidney Hawkins1
- John Sotheby1
- Joseph Anton Koch1
- Joseph L. Lilly1
- Joseph Mayner1
- Juan Burgueño1
- Judith Lady Montefiore College1
- Julian Burgueño1
- Kenneth Hyde1
- Lancino Curti1
- Laurence Claiborne Witten II1
- Laurence Kirby1
- Law Society1
- Leicester Harmsworth1
- Leonard Grey, 1st Viscount Grane1
- Levi, David, active 19th century1
- Lionardo di Paolo Adimari1