- Hell--Islam1
- Hemorrhoids1
- Henry I, King of Castile, 1204-12171
- Henry II, King of Castile, 1333-13791
- Henry III, King of Castile and León, 1379-14061
- Herbs1
- Heresy1
- Hermes, Trismegistus1
- Hertford, Katherine Seymour, Countess of, 1540-15681
- Hieron I, Tyrant of Syracuse, -467 B.C. or 466 B.C.1
- Hilarion, Saint, approximately 291-approximately 3711
- Hilkhot Shabat (Jacob ben Asher)1
- Hilkhot maʼakhalot asurot (Maimonides, Moses)1
- Hilkhot nidah (Karo, Joseph ben Ephraim)1
- Hilkhot sheḥiṭah (Karo, Joseph ben Ephraim)1
- Hilkhot sheḳalim (Maimonides, Moses)1
- Hilkhot ḳidush ha-ḥodesh (Maimonides, Moses)1
- Hilkhot ṭerefot (Karo, Joseph ben Ephraim)1
- Hindu gods1
- Hindu mathematics1