- Gregory I, Pope, approximately 540-604.1
- Gregory the Great1
- Grew, Nehemiah, 1641-17121
- Guiccardini, Luigi1
- Hieronymus de Villa Vitis1
- Higden, Ranulf, -13641
- Higden, Ranulphus (Ranulph/Ranulf)1
- Hollar, Wenceslaus, 1607-16771
- Hugo, de Novo Castro1
- Institoris, Heinrich, 1430-1505 (Author)1
- Jacobus Philippus, Bergomensis, 1434-15201
- Jansson, Jan, 1558-16641
- John, of Palentia, brother1
- Jordan, von Quedlinburg, approximately 1299-13801
- Josephus, Flavius1
- Justinian1
- Llull, Ramon, 1232?-13161
- Lucanus, 39-651
- Macrobius, Ambrosius Aurelius Theodosius1
- Maggio, Giuniano, active 15th century.1