Former Owner
- Jérôme Bignon1
- K-L1
- K. B. Starkie1
- Karen L. Gould26
- Karl F. Morrison2
- Karl Wilhelm Hiersemann8
- Kartause Erfurt1
- Katheline Minnis1
- Katherine Petersen1
- Katherine Somerset Wyttenbach Fenwick7
- Keith Jarvis4
- Kenneth J. "Bud" Jennings2
- Klaus Dieter Dahmen1
- Kloster Bredelar1
- Kloster Kuringen1
- Kloster Rebdorf1
- Kulturhistorisches Museum Magdeburg1
- L. C. Harper1
- L. Paganthus1
- Lady Margaret Ayloffe1