Former Owner
- John R. Anderson & Co1
- John Rolls, 1st Baron Llangattock1
- John Shirley1
- John Swyntoun1
- John Thomas Beer1
- John Towneley1
- John Trotter Brockett1
- John William Harshberger1
- Jonathan Peckover1
- Joseph François René de Kergariou1
- Joseph L. Lilly1
- Joseph Whitney1
- Joseph ben Aryeh1
- Julius Hess1
- Justin MacCarthy Reagh1
- Kenneth Hyde1
- Kloster Bredelar1
- Konrad von Maurer1
- Kulturhistorisches Museum Magdeburg1
- Lajos Graf Apponyi de Nagy-Appony1