Former Owner
- Juana I of Castile1
- Juana Mendel1
- Jules Bonhomme1
- Julie de Busnel1
- Julius Hess1
- Julius de Cardelinis1
- Jérôme Bignon1
- Jérôme Pichon1
- Jāgeśvara1
- Jān Sipār Khān ibn Rustamdilkhān1
- K. B. Starkie1
- Kang Youwei1
- Karbalāʼī Muḥammad Ḥusayn Qāsimʹābādī1
- Karl Anton, Prince of Hohenzollern1
- Karl Leopold Strauven1
- Karva, Lakṣmaṇabhaṭṭa1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Kenneth X. Robbins1
- Khiste, B.N1
- Khouri, Elias Alexander1