- Horn, Arvid Bernhard, Count
- Horn, Philip de Montmorency, Count of
- Horn (hero)
- Horn (anatomy)
- Horn (music)
- Hornbeam
- Hornbill
- Hornblende
- Horn-book
- Hornby, Sir Geoffrey Thomas Phipps
- Horncastle
- Horn Dance
- Horne, George
- Horne, Richard Henry
- Horne, Thomas Hartwell
- Hornell
- Hornemann, Frederick
- Horner, Francis
- Horner, Leonard
- Hörnes, Moritz
- Hornfels
- Horning, Letters of
- Hornpipe
- Hornsey
- Horowitz, Isaiah
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- Horreum
- Horrocks, Jeremiah
- Horrocks, John
- Horse
- Horse Latitudes
- Horse-mackerel
- Horsemanship
- Horsens
- Horse-power
- Horse-racing
- Horseradish
- Horse-shoes
- Horsetail
- Horsham
- Horsley, John
- Horsley, John Callcott
- Horsley, Samuel
- Horsley, William
- Horsman, Edward
- Horst
- Hort, Fenton John Anthony
- Horta
- Horten
- Hortensius, Quintus (orator)
- Hortensius, Quintus (dictator)
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- Hostel
- Hostius
- Hosur
- Hotch-pot
- Hôtel-de-Ville
- Hôtel-Dieu
- Hotham, Sir John
- Hotham, William Hotham, 1st Baron
- Hotho, Heinrich Gustav
- Hoti-Mardan
- Hotman, François
- Hot Springs (Arkansas)
- Hot Springs (Virginia)
- Hottentots
- Hottinger, Johann Heinrich
- Houbraken, Jacobus
- Houdenc, Raoul de
- Houdetot
- Houdetot, Elisabeth ... de Bellegarde, Comtesse de
- Houdon, Jean Antoine
- Houffalize
- Houghton, Richard Monckton Milnes, 1st Baron
- Houghton-le-Spring
- Hound
- Hounslow
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