Former Owner
- Jān Sipār Khān ibn Rustamdilkhān1
- Karbalāʼī Muḥammad Ḥusayn Qāsimʹābādī1
- Karl Wilhelm Hiersemann1
- Kartause Erfurt1
- Kenneth Hyde1
- Khammāsh, Aḥmad1
- Khouri, Elias Alexander1
- King Lawrence Parker1
- Kloster Bredelar1
- Kloster Kuringen1
- L. C. Harper1
- Lathrop C. Harper, Inc.1
- Laurence Hilliard1
- Laurence Vaux1
- Leigh Baker1
- Libreria antiquaria Mediolanum1
- Libreria la Bibliofila1
- Lorenzo Antonio da Ponte1
- Louis H. Silver1
- Louis Herbert Gray1