Former Owner
- John D. McKenna1
- John F. Fleming1
- John Frederick Lewis1
- John Harrison-Broadley1
- John Harvey Treat1
- John Henry Ellis1
- John Trotter Brockett1
- John William Harshberger1
- Joseph Barrois1
- Joseph François René de Kergariou1
- Joseph Jekyll1
- Joseph Whitney1
- Julius Hess1
- Klaus Dieter Dahmen1
- Kulturhistorisches Museum Magdeburg1
- Latham family1
- Laurence Claiborne Witten II1
- Laurence Kirby1
- Laurentius van der Torqel1
- Leonardo Lapiccirella1