Former Owner
- Julius Heinrich Jeidels1
- Julius Hess1
- Julius de Cardelinis1
- Justin MacCarthy Reagh1
- Jérôme Bignon1
- Jérôme Pichon1
- K-L1
- K. B. Starkie1
- Karl Anton, Prince of Hohenzollern1
- Karl Leopold Strauven1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Klaus Dieter Dahmen1
- Kloster Kuringen1
- Kulturhistorisches Museum Magdeburg1
- L. C. Harper1
- L. Paganthus1
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Lancino Curti1
- Lane Theological Seminary1