Former Owner
- J. Martini1
- Jacob Le Maire1
- Jacques Rosenthal1
- James R. Herbert Boone1
- James Turle1
- Jay Gould1
- Jean Budé1
- John Bigham, 1st Viscount Mersey1
- John D. McKenna1
- John Frederick Lewis1
- John M Cuthbert1
- John Ruskin1
- Joseph Whitney1
- Joseph-Félix Allard1
- Julius Heinrich Jeidels1
- Lane Theological Seminary1
- Laurence Claiborne Witten II1
- Laurence Kirby1
- Louis II, Count of Flanders1
- Luigi Arrigoni1