- Iustinus.1
- Ivani, Antonio, 1430-1482.1
- Jacobus, Mediolanensis, active 13th century.1
- Jacobus, de Cessolis, active 1288-1322.1
- Jacobus, de Theramo, 1350 or 1351-1417.1
- Johannes, de Caulibus, 14th cent.1
- John, of Wales, 13th cent.1
- Josquin, des Prez, -1521.1
- Lactantius, approximately 240-approximately 320.1
- Langland, William, 1330?-1400?1
- Latini, Brunetto, 1220-1295.1
- Legrand, Jacques, approximately 1365-1415.1
- Livy.1
- Llull, Ramon, 1232?-1316.1
- Loschi, Antonio, d. 1441.1
- Love, Nicholas, fl. 1410.1
- Lucan, 39-65.1
- Macer, Floridus.1
- Maerlant, Jacob van, 1235?-1300.1
- Mannyng, Robert, fl. 1288-1338.1
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