Former Owner
- John B. Stetson Jr.1
- John Cochran1
- John Frederick Lewis1
- John Henry Ellis1
- John Henry Nash1
- John Hinsdale Scheide1
- John Roland Abbey1
- John Ruskin1
- John Towneley1
- John Ward, 1st Earl of Dudley1
- Joost Ritman1
- Jorge de Ataíde1
- Joseph Neeld1
- Juan Burgueño1
- Juan de Gayferos de Eguiraum1
- Juan de Iriarte y Cisneros1
- Judith Lady Montefiore College1
- Julian Burgueño1
- Karen L. Gould1
- Lady Frances Bentinck1