- Gunpowder1
- Guy of Warwick (Legendary character)--Romances1
- Hadith1
- Haimo, of Auxerre, -approximately 8551
- Harmonies (Reference works)1
- Hebrew language--Alphabet1
- Henry III, King of France, 1551-15891
- Henry VI, King of England, 1421-14711
- Hieronymites1
- History of Biblical events1
- Holy Shroud1
- Household employees1
- Hugh, of Cluny, Saint, 1024-11091
- Hundred Years' War (1339-1453)1
- Hungary1
- Hydrology1
- Ibn Nawbakht, Ibrāhīm, active 10th century. Yāqūt fī ʻilm al-kalām1
- Iceland1
- Incarnation1
- Indulgences1