Former Owner
- John F. Fleming1
- John Harvey Treat1
- John Henry Wrenn1
- John Morgan1
- John Ruskin1
- John Topham1
- John West, 1st Earl De La Warr1
- John Wright1
- Joseph Whitney1
- Josephine Widener Wichfield1
- Julia Burgess1
- Lady Margaret Ayloffe1
- Lambertus Eerens1
- Lathrop Colgate Harper1
- Laurence Kirby1
- Laurent Campagne1
- Legoué1
- Leo Olschki1
- Libri, Edoardo, active 20th century1
- Lisa Norris Elkins1