Former Owner
- John Borthwick, 14th of Crookston1
- John Boykett Jarman1
- John C. Jackson1
- John Harvey Treat1
- John Henry Ellis1
- John Morgan1
- John Read Dore1
- John West, 1st Earl De La Warr1
- John Wright1
- Josephine Widener Wichfield1
- Lambertus Eerens1
- Laurence Claiborne Witten II1
- Laurent Campagne1
- Laurentius van der Torqel1
- Legoué1
- Lisa Norris Elkins1
- Louis César de La Baume Le Blanc1
- Ludwig Rosenthal1
- Luigi Cora1
- Luigi Serra di Cassano1