Name
- Innocent X, Pope1
- Inquisition1
- Isabelle, Duchess of Burgundy1
- Ivo, Episcopus Carnotensis1
- Janua, Symon1
- Jesus Christ, c 6 BC-c 30, http://isni.org/isni/000000... http://viaf.org/viaf/2990306441
- Johannes Mesue, of Add MS 228091
- John Cassian, Abbot of Saint-Victor, c 360-c 432, http://isni.org/isni/000000... http://viaf.org/viaf/74086761
- John II d'Albret, King of Navarre1
- Kepler, Johann1
- Kircher, Athanasius, Jesuit polymath, 1602-16801
- Lanfredini, Orsino1
- Lentiis, Mundinus1
- Lentulus, Publius, of Add MS 209351
- Lercari, Family1
- Lercaro, Giovanni Battista, Doge of Genoa1
- Lerici, Bernardino de', Decano Generale delle Corti di Roma1
- Libri, Guglielmo, scientist, book collector, and thief, 1802-18691
- Loreti, Enc1
- Lorraine, Charles, Duke of Lorraine, Charles III, 1543-16081