Former Owner
- James Turle1
- Jay Gould1
- Joaquín Gómez de la Cortina1
- Johann von Firmian1
- John B. Stetson Jr.1
- John Bellingham Inglis1
- John Bulkeley1
- John Camp Williams1
- John D. Stanitz1
- John Hinsdale Scheide1
- John Holt1
- John Ruskin1
- John Sidney Hawkins1
- Joseph Anton Koch1
- Joseph Mayner1
- Kenneth Hyde1
- Lancino Curti1
- Laurence Kirby1
- Law Society1
- Leicester Harmsworth1