Former Owner
- Jeannette Dwight Bliss1
- Johann Egolph1
- Johann von Firmian1
- John Burns1
- John Eliot Hodgkin1
- John Haskell Shedd1
- John Paget1
- John Payne Collier1
- John Shelton Lawrence1
- John Towneley1
- Jorge de Ataíde1
- Joseph Ernst Koch-Sternfeld1
- Joseph Franz Gross1
- Joseph Halle Schaffner1
- Joseph Neeld1
- Joseph Pope1
- Joseph Pulilo1
- Juan Antonio de la Reguera1
- Julian I. Edison1
- Jón Þorstensson1