Former Owner
- Johannes, de Sancto Nabore1
- John Alfred Wigan1
- John B. Stetson Jr.1
- John Bellingham Inglis1
- John Couch Adams1
- John Eliot Hodgkin1
- John F. Fleming1
- John Gribbel1
- John Harrison-Broadley1
- John Hindley1
- John Hirst1
- John Hope, 1st Marquess of Linlithgow1
- John Morgan1
- John Shelton Lawrence1
- John Walker1
- Joseph E. Widener1
- Juan de Aillon1
- Juan de Torquemada1
- Julius Hess1
- Katherine Petersen1