- Jacoba of Bavaria (countess of Holland): 2475.
- Jacobus (saint): 604, 1573.
- Jacotius Vandoperanus, Desiderius: 983, 985, 986, 987, 988.
- Jalhea, P. de: 2039.
- Jamblichus: 1135.
- Jamotius, Federicus: 918, 1460 .
- Jamyn, B.: 2467 bis.
- Jannottus, Antoni a (bishop): 913.
- Janot, Denys (publisher in Paris): 54, 2468.
- Jansen, Hendrik: see Barrefelt.
- Jansenius, Cornelius: 1284, 1472, 1957, 2312.
- Janssen van Kampen, Gerard (woodcutter): 12, 13, 22, 27, 639, 822, 897, 898, 899, 900, 901, 902, 903, 1006, 1007, 1031, 1095, 1097, 1099, 1162, 1163, 1243, 1476, 1578, 1690, 1695, 1696, 1700, 2168, 2169; Add. 13.
- Janssens Solt, Erasmus: See Johannis Solt, Erasmus.
- Jansonius, Jacobus: 1508.
- Januarius (saint): 1762, 1763, 2217.
- Jara, Manrique de: 939A.
- Jardin, Jodoca du: 1284.
- Jaureguy, Jean: 212, 214, 1925, 1927, 1928, 1929.
- Jemme Reinertz.: See Gemma Frisius.
- Jemme, Cornelius: See Gemma, Cornelius.
- Jenkinson: 2094.
- Jerôme: See Hieronymus.
- Jessée (Gessée), Jean de la (Jesseus, Joannes): 727, 1461, 1462, 1463, 1464, 1465, 1466 , 1831, 1930; p. 1833.
- Jeune (Lejeune), Claudin Le: 1467 .
- Jeune (Juvenis, Juvenius) Martin le (bookseller in Paris): 2, 33, 34, 35, 36, 53, 722, 735, 737, 803, 842, 1088, 1089, 1176, 1190, 1220, 1248, 1375, 1618, 1641, 1811, 1812, 1949, 2052, 2086, 2117, 2208, 2307, 2449, 2467.
- Jimenez, Diego: See Ximenes, Didacus.
- Joannes XXII (pope): 1030, 1031.
- Joannes I.F.: 2262.
- Joannes Chrysostomos (Chrysostomus): 20, 621, 1175, 1265, 1468, 1469, 1470 , 1573, 2441.
- Joannes Damascenus (Damascène): 1573.
- Joannes Ninivita: 11.
- Joannes Intrepidus: see John the Bold.
- Jode, Gerard de (publisher and engraver in Antwerp): 38, 1706, 1706 bis.
- Jodelius (Jodelle), Stephanus (Estienne): 47, 1336, 2151, 2152, 2311.
- Johanna of Castile: 1016.
- Johannes of Constantinople: 2081.
- Johannes (Joannes) of Kastl: 20.
- Johannis (Janssens; Dejean) Solt, Erasmus: 1471 .
- John (king of Portugal): 53.
- John I (king of Portugal): 1625.
- John III (king of Portugal): 59, 2312, 2314.
- John of Bavaria (count of Holland): 625.
- John the Bold (Joannes Intrepidus) (duke of Burgundy): 1325.
- Johnson (Jonson), Robert: 1472 .
- Joigny de Pamele, Jacobus: See Pamelius, Jacobus.
- Joliffus (Joliffe), Henry: 1472 .
- Jonas, bishop of Orléans: 1473 .
- Jonghe, Hadrianus De: See Junius, Hadrianus.
- Jonson, Robert: See Johnson, Robert.
- Jordanus, Fabius: 850.
- Josephus: 2123.
- Joubertus, Laurentius: 2150.
- Jovianus, Joannes: 2367.
- Jovinianus: 604.
- Jovius, P.: 2175.
- Juan of Austria (Joannes Austriacus), Don: 913, 1167, 1236, 1261, 1869, 1870, 1871, 1872, 1876, 1880, 1881, 1882, 1883, 1884, 1885, 1888, 1889, 2337, 2338, 2340.
- Jucundus, Joannes: 854, 855, 856, 857, 858.
- Juliana vidua: 604.
- Julianus: 604, 626.
- Julianus Aegyptius: 2056.
- Julius III (pope): 905, 906, 907, 908, 913, 979.
- Julius Paris: 2411.
- Junches d'Arellano, Pero: 2465.
- Junius (De Jonghe), Hadrianus: 18, 593, 1053, 1109, 1128, 1135, 1142, 1143, 1144, 1219, 1253, 1307, 1323, 1324, 1475, 1476, 1477, 1478, 1479, 1480, 1481, 1482, 1483, 1484, 1485, 1486, 1487, 1488, 1489, 1490, 1491, 1492 , 1493, 1494, 1584, 1585, 1586, 1589, 1637, 1638, 1725, 1752, 1817, 1820, 1965, 2077, 2168, 2175, 2189, 2190, 2299, 2300, 2302, 2303, 2304; Add. 1484.
- Junius, Petrus: 1476, 1481.
- Junta (publishing firm in Venice; see also Giunti): 617, 618, 686.
- Junta (publishing firm in Lyons): 2312.
- Junta, Philippus (publisher in Venice): 854.
- Juretus, Franciscus: 25, 27.
- Justinianus (Byzantine emperor): 15, 1034, 1035, 1036, 1960.
- Justinianus, Vincentius: 913.
- Justinus (Byzantine emperor): 1025, 1035, 1036, 1573.
- Juvenalis, Decimus Junius: 591, 1142, 1387, 1493, 1494, 1495, 1496, 1497 , 1554, 2455.
- Juvencus: 1610.
- Juvenis (Juvenius), Martinus: see Jeune, Martin le.
- Juvenis, Rogerius: 2425.