Former Owner
- Julie de Busnel1
- Julius Hess1
- Justin MacCarthy Reagh1
- Jérôme Bignon1
- Jérôme Pichon1
- K-L1
- K. B. Starkie1
- Karl Anton, Prince of Hohenzollern1
- Karl Leopold Strauven1
- Kenneth Hyde1
- Kloster Kuringen1
- Kulturhistorisches Museum Magdeburg1
- L. C. Harper1
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Lane Theological Seminary1
- Latham family1
- Laurence Hilliard1
- Laurence Kirby1
- Laurence Vaux1