- Gregory I, Pope, approximately 540-6041
- Guielma1
- Gunnery1
- Gunpowder1
- Guy of Warwick (Legendary character)--Romances1
- Haftarot1
- Hagiography1
- Haimo, of Auxerre, -approximately 8551
- Happiness1
- Hebrew language--Alphabet1
- Hebrew language--Etymology1
- Hecuba, Queen of Troy1
- Heilig-Geist-Spital (Eichstätt, Germany)1
- Hepay, Peter de, 13th century1
- Hercules (Roman mythological character)1
- Heresy1
- Hermetic philosophers1
- Hermits1
- Heroides (Ovid)1
- Hieron I, Tyrant of Syracuse, -467 B.C. or 466 B.C.1