Former Owner
- Joseph Mayner1
- Joseph Whitney1
- Josiah H. Benton1
- José Antonio Conde1
- Juan Burgueño1
- Juan de Gayferos de Eguiraum1
- Juan de Londono1
- Juana I of Castile1
- Juana Mendel1
- Jules Bonhomme1
- Julian Burgueño1
- Julie de Busnel1
- Julius Hess1
- Julius de Cardelinis1
- Jérôme Bignon1
- Jérôme Pichon1
- Jāgeśvara1
- Jān Sipār Khān ibn Rustamdilkhān1
- K. B. Starkie1
- Kang Youwei1