Former Owner
- John Patteson1
- John R. Anderson & Co1
- John Roland Abbey1
- John Ruskin1
- John Savile1
- John Singer Sargent1
- John Taylor1
- John Thomas Beer1
- Joseph Anton Koch1
- Joseph Ernst Koch-Sternfeld1
- Joseph Halle Schaffner1
- Joseph Pope1
- Joseph ben Aryeh1
- Joseph-Félix Allard1
- José Fernando Ramírez1
- Juan Antonio de la Reguera1
- Juana I of Castile1
- Judah ben Moses, ha-Rofe, ha-Kohen1
- Julius de Cardelinis1
- Jérôme Bignon1