Former Owner
- Joachim Guerrinus de Montefegatesio1
- Joannes Hainricus Ebron zu Wildenberg1
- John Bolton1
- John Boyd Thacher I1
- John Caryll1
- John Harvey Treat1
- John Haskell Shedd1
- John Henry Ellis1
- John James Lewis1
- John Thomas Beer1
- John William Harshberger1
- Joseph Barrois1
- Joseph Pope1
- José Fernando Ramírez1
- Lane Theological Seminary1
- Laurence Kirby1
- Lorenzo de Olivera1
- Louis Charles Elson1
- Louis N. Cassett1
- Luigi Serra di Cassano1