Former Owner
- Jérôme Pichon1
- K-L1
- K. B. Starkie1
- Karen L. Gould28
- Karl Anton, Prince of Hohenzollern1
- Karl F. Morrison2
- Karl Leopold Strauven1
- Karl Theodor Völcker's Verlag Und Antiquariat3
- Karl Wilhelm Hiersemann8
- Kartause Erfurt2
- Katherine Petersen1
- Katherine Somerset Wyttenbach Fenwick8
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Keith Jarvis4
- Kenneth Hyde1
- Kenneth J. "Bud" Jennings2
- Klaus Dieter Dahmen1
- Kloster Bredelar1
- Kloster Kuringen1
- Kloster Rebdorf2