Former Owner
- John Ruskin1
- John Sidney Hawkins1
- John Sotheby1
- Joseph L. Lilly1
- Joseph Mayner1
- Juan Burgueño1
- Judith Lady Montefiore College1
- Julian Burgueño1
- Kenneth Hyde1
- Konrad von Maurer1
- Lancino Curti1
- Law Society1
- Leicester Harmsworth1
- Leo Olschki1
- Leonard Grey, 1st Viscount Grane1
- Levi, David, active 19th century1
- Lionardo di Paolo Adimari1
- Lodovicus Saltariellus1
- Lorenzo Antonio da Ponte1
- Louis César de La Baume Le Blanc1