Former Owner
- John Eliot Hodgkin1
- John F. Fleming1
- John Frederick Lewis50
- John Gribbel1
- John Harrison-Broadley1
- John Henry Ellis2
- John Hindley1
- John Hirst1
- John Hope, 1st Marquess of Linlithgow1
- John Morgan1
- John Rolls, 1st Baron Llangattock3
- John Shelton Lawrence1
- John Walker1
- Joseph Barrois11
- Joseph E. Widener1
- Juan de Aillon1
- Juan de Torquemada1
- Judith Lady Montefiore College1
- Julia Burgess1
- Julie Florence de Cossette1