Former Owner
- Isabella d'Este1
- J. Techener1
- Jean François de Kerchove, Heer van Etikhove, La Deuze, Champagne, Vaulx1
- Jehanne Seigneau1
- John B. Stetson Jr.1
- John Harrison-Broadley1
- John Harvey Treat1
- John Ruskin1
- John Shelton Lawrence1
- John Trotter Brockett1
- Joseph François René de Kergariou1
- K. B. Starkie1
- Klaus Dieter Dahmen1
- Kulturhistorisches Museum Magdeburg1
- Latham family1
- Leonello d'Este, Marquis of Ferrara1
- Lucien Graux1
- Luigi Celotti1
- Mademoiselle de Malberghe1
- Maffeo Pinelli1