Former Owner
- John Barrymore1
- John Carter1
- John Dare1
- John Egylsfelld1
- John Henry Wrenn1
- John Hinsdale Scheide1
- John Morley1
- John Pery1
- John William Burns1
- Joost Ritman1
- Joseph Haslewood1
- Joseph May Spetzler1
- K-L1
- Kartause Erfurt1
- Kloster Rebdorf1
- Lehn of Denmark1
- Leicester Harmsworth1
- Lew David Feldman1
- Long Island Historical Society, Maine1
- Luigi Celotti1