Former Owner
- Johannes de Helb1
- John Boykett Jarman1
- John Eliot Hodgkin1
- John Fletcher Hurst1
- John Harvey Treat1
- John Haskell Shedd1
- John Morgan1
- John Walker1
- John William Harshberger1
- Joseph Anton Koch1
- Joseph François René de Kergariou1
- Joseph Pope1
- José Fernando Ramírez1
- Julie Florence de Cossette1
- Kloster Kuringen1
- Lambertus Eerens1
- Lathrop Colgate Harper1
- Laurence Claiborne Witten II1
- Laurence Kirby1
- Laurent Campagne1