Former Owner
- Joaquín García Icazbalceta3
- Johan Meerman3
- John Brayfield Ball3
- John Harvey Treat3
- John Rolls, 1st Baron Llangattock3
- John Wallop, Viscount Lymington3
- Joseph-Félix Allard3
- José Fernando Ramírez3
- Justin MacCarthy Reagh3
- Karl Theodor Völcker's Verlag Und Antiquariat3
- Lambach Abbey3
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn3
- London School of Jewish Studies3
- Louis XII of France3
- Lydia Thompson Morris3
- Manuel Fernández del Castillo3
- Marie-François Duchesne de Beaumanoir3
- Martin Picker3
- Nancy McGrath3
- Otto Orren Fisher3