Former Owner
- Joseph Jekyll1
- Joseph L. Lilly1
- Joseph Marie Sormani1
- Joseph May Spetzler1
- Joseph Whitney1
- Joseph ben Aryeh1
- Josiah H. Benton1
- Juan de Aillon1
- Juan de Torquemada1
- Jules Bonhomme1
- Julie de Busnel1
- Julius Hess1
- Julius de Cardelinis1
- Justin MacCarthy Reagh1
- K-L1
- Karl F. Morrison1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Keifer1
- Klaus Dieter Dahmen1
- Kloster Rebdorf1