Former Owner
- John Ives1
- John Lee1
- John Leeche1
- John M Crawford, active 17601
- John M Cuthbert1
- John McRay1
- John Reiner2
- John Roland Abbey1
- John Ruskin2
- John Vyfyan1
- Joseph Barrois5
- Joseph E. Widener1
- Joseph Pope3
- José Antonio Conde1
- Judah ben Moses, ha-Rofe, ha-Kohen1
- Justin MacCarthy Reagh1
- Karen L. Gould4
- Keith Jarvis1
- Kenneth X. Robbins1
- Kloster Rebdorf1