Former Owner
- John Edgar Ker1
- John Fenn1
- John Henry Nash1
- John Hope, 1st Marquess of Linlithgow1
- John Lee1
- John Roland Abbey1
- John Ruskin1
- John Shelton Lawrence1
- John Sotheby1
- John Thomas Beer1
- John Towneley1
- John Ward, 1st Earl of Dudley1
- John William Harshberger1
- Joseph Ernst Koch-Sternfeld1
- Juan Burgueño1
- Julian Burgueño1
- Julius de Cardelinis1
- Jérôme Pichon1
- Katherine Somerset Wyttenbach Fenwick1
- L. Paganthus1