Former Owner
- J. A. Shanley1
- J. Martini1
- James Dickson Clark, active Brooklyn in 1860.1
- James Turle1
- Jay Gould1
- Jeanne Govro1
- Joannes Hainricus Ebron zu Wildenberg1
- John Bolton1
- John Boyd Thacher I1
- John Caryll1
- John Henry Ellis1
- John James Lewis1
- John Rolls, 1st Baron Llangattock1
- John Thomas Beer1
- John William Harshberger1
- Julie Florence de Cossette1
- Laurence Kirby1
- Leonello d'Este, Marquis of Ferrara1
- Louis N. Cassett1
- Ludwig Rosenthal's Antiquariaat1