Former Owner
- Jacob Henry Burn1
- Jacob Riegel1
- Jacques Rosenthal1
- Jay Gould1
- Jean-Baptiste Huzard1
- Johannes Baptista Siccus1
- Johannes Betrus Ravenoldus1
- John C. Jackson1
- John Camp Williams1
- John D. Stanitz1
- John Henry Ellis1
- John Lee1
- John Ruskin1
- John Ward, 1st Earl of Dudley1
- Juana Mendel1
- Judith Lady Montefiore College1
- Katherine Somerset Wyttenbach Fenwick1
- Lionardo di Paolo Adimari1
- Lorenzo Antonio da Ponte1
- Ludwig Rosenthal's Antiquariaat1