Former Owner
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Kenneth Hyde1
- Klaus Dieter Dahmen1
- Konrad von Maurer1
- Kulturhistorisches Museum Magdeburg1
- Lady Margaret Ayloffe1
- Lambertus Eerens1
- Lancino Curti1
- Lathrop Colgate Harper1
- Laura Hurd Motion1
- Laurence Kirby1
- Law Society1
- Leicester Harmsworth1
- Lionel Tollemache, 4th Earl of Dysart1
- Lodovicus Saltariellus1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis Charles Elson1
- Louis Thompson Rowe1
- Louis XIV of France1