- Helvétius, Claude Adrien
- Helvidius Priscus
- Hely-Hutchinson, John
- Helyot, Pierre
- Hemans, Felicia Dorothea
- Hemel Hempstead
- Hemerobaptists
- Hemichorda
- Hemicycle
- Hemimerus
- Hemimorphite
- Hemingburgh, Walter of
- Hemiptera
- Hemlock
- Hemp
- Hemsterhuis, François
- Hemsterhuis, Tiberius
- Hemy, Charles Napier
- Hen
- Hénault, Charles Jean François
- Henbane
- Henchman
- Henderson, Alexander
- Henderson, Ebenezer
- Henderson, George Francis Robert
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- Henry "The Lion"
- Henry, Prince of Battenberg
- Henry Fitz Henry
- Henry Benedict Maria Clement Stuart
- Henry of Portugal
- Henry of Almain
- Henry of Blois
- Henry of Ghent
- Henry of Huntingdon
- Henry of Lausanne
- Henry, Edward Lamson
- Henry, James
- Henry, Joseph
- Henry, Matthew
- Henry, Patrick
- Henry, Robert
- Henry, Victor
- Henry, William
- Henryson, Robert
- Henschel, George
- Henselt, Adolf von
- Henslow, John Stevens
- Henslowe, Philip
- Henty, George Alfred
- Henwood, William Jory
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