Former Owner
- Johann Heinrich van Ess1
- Johann Heinrich von Speyr-Passavant1
- Johann Michael Schiller1
- Johannes Lethe1
- Johannes Wigg1
- John Alexander Stewart1
- John Bohn1
- John C. Jackson1
- John Camp Williams1
- John Church1
- John Edgar Ker1
- John Fenn1
- John Lee1
- John Leeche1
- John Thomas Beer1
- Joseph Barrois1
- Juan Burgueño1
- Julian Burgueño1
- Julius de Cardelinis1
- Kenneth X. Robbins1