Former Owner
- John B. Stetson Jr.1
- John Bellingham Inglis1
- John Couch Adams1
- John D. Denman1
- John Eliot Hodgkin1
- John Gribbel1
- John Harrison-Broadley1
- John Henry Backhouse1
- John Hope, 1st Marquess of Linlithgow1
- John Stirton1
- John Towneley1
- John Trotter Brockett1
- Jonathan Peckover1
- Joseph Barrois1
- Joseph François René de Kergariou1
- Joseph L. Lilly1
- Joseph ben Aryeh1
- Juan de Aillon1
- Juan de Torquemada1
- Justin MacCarthy Reagh1