Former Owner
- Jay Gould1
- Jeanne Govro1
- Jivanji Jamshedji Modi1
- Joachim Guerrinus de Montefegatesio1
- Joannes Hainricus Ebron zu Wildenberg1
- John Bolton1
- John Boyd Thacher I1
- John Caryll1
- John Frederick Lewis3
- John Harvey Treat1
- John Haskell Shedd1
- John Henry Ellis1
- John James Lewis1
- John Rolls, 1st Baron Llangattock1
- John Thomas Beer1
- John William Harshberger1
- Joseph Barrois3
- Joseph Pope1
- José Fernando Ramírez3
- Julie Florence de Cossette1