Former Owner
- John Shelton Lawrence1
- John Thomas Beer1
- Joost Ritman1
- Joseph Anton Koch1
- Joseph Pope1
- Joseph Pulilo1
- Juan Antonio de la Reguera1
- Judith Lady Montefiore College1
- Julius Heinrich Jeidels1
- Justin MacCarthy Reagh1
- Katherine Somerset Wyttenbach Fenwick1
- L. Paganthus1
- Lambach Abbey1
- Lathrop C. Harper, Inc.1
- Laurent Campagne1
- Legoué1
- Leonhardus Cuntius1
- Lisa Norris Elkins1
- Loftus Bland1
- Louis César de La Baume Le Blanc1