Former Owner
- John Taylor1
- John Thomas Beer1
- John Towneley1
- Joseph Ernst Koch-Sternfeld1
- Joseph Pope1
- Joseph-Félix Allard1
- Juan Burgueño1
- Juan de Gayferos de Eguiraum1
- Juana I of Castile1
- Julian Burgueño1
- Julius de Cardelinis1
- Jérôme Bignon1
- Kenneth X. Robbins1
- Khouri, Elias Alexander1
- King Lawrence Parker1
- Kloster Bredelar1
- Kloster Rebdorf1
- Kāle, Gālambhaṭṭa1
- Kāle, Janārdana1
- Lajos Graf Apponyi de Nagy-Appony1