Former Owner
- Juana I of Castile1
- Juana Mendel1
- Judah ben Moses, ha-Rofe, ha-Kohen1
- Judith Lady Montefiore College6
- Jules Bonhomme1
- Julian Burgueño1
- Julian I. Edison1
- Julie de Busnel1
- Julien Peridier1
- Julius Bisno1
- Julius Heinrich Jeidels1
- Julius Hess1
- Julius de Cardelinis1
- Justin MacCarthy Reagh3
- Jérôme Bignon1
- Jérôme Pichon2
- Jón Þorstensson1
- Jāgeśvara1
- Jān Sipār Khān ibn Rustamdilkhān1
- K-L1