Former Owner
- Johannes Betrus Ravenoldus1
- Johannes Lethe1
- Johannes Wigg1
- John A. Savage Jr.1
- John Bohn1
- John C. Jackson1
- John Camp Williams1
- John Church1
- John Edgar Ker1
- John Hinely1
- John James Lewis1
- John Leeche1
- John Roland Abbey1
- John Ruskin1
- John William Harshberger1
- Joseph Barrois1
- Judith Lady Montefiore College1
- Julius de Cardelinis1
- L. Paganthus1
- Lambach Abbey1