- Gorham, George Cornelius
- Gorham Controversy
- Görup-Besanez, Eugen
- Gospel
- Gossamer
- Gosse, Edmund William
- Gosse, Nicolas Louis François
- Gosse, Philip Henry
- Gotland
- Gotskowski, Johann Ernst
- Gottenburg
- Gotter, Friedrich Wilhelm
- Götterdämmerung
- Götterdämmerung (Ragnarök)
- Gottfried, Johann Philipp
- Gottfried von Strassburg
- Gotthelf, Jeremias
- Gotti, Girolamo Maria
- Göttingen
- Göttingen, University of
- Göttling, Karl Wilhelm
- Gottsched, Johann Christoph
- Götz, Hermann
- Götzen, Friedrich, Count
- Götzen, Gustav Adolf, Count von
- Götzenberger, Jakob
- Götzkowski, Johann Ernst
- Graff, Anton
- Graff, Eberhard Gottlieb
- Graff, Frederick
- Graffenried, Christopher
- Graffigny, Françoise d'Issembourg d'Happoncourt de
- Graffiti
- Gräfle, Albert
- Grange
- Grant, (Hiram) Ulysses Simpson
- Grease-Moth
- Greasewood
- Great Auk
- Great Barrington
- Great Basin
- Great Bear Lake
- Great Bend
- Great Berkhampstead
- Great Bible
- Great Fish River (Canada)
- Great Fish River (Cape Colony)
- Great Harry
- Great Harwood
- Greatheart, Mr.
- Great Horned Owl
- Great Kanawha
- Great Lakes
- Great Lake Trout
- Great Manitoulin
- Great Marlow
- Great Marquis, The
- Great Master of Love
- Great Mother
- Greatorex, Eliza (Pratt)
- Great Pacificator, The
- Great Pedee River
- Greatrakes, Valentine
- Great Rift Valley
- Great Salt Lake
- Great Seal
- Great Slave Lake
- Great Slave River
- Great Stone Face, The
- Great Tom
- Great Unwashed, The
- Great Valley
- Great Wall of China
- Greaves
- Greaves, John
- Greaves, Launcelot
- Grillparzer, Franz
- Grimm's Law
- Groesbeck, William Slocomb
- Grogg, Colonel
- Groined Vaulting
- Grolier Club
- Grolier de Servières, Jean
- Grolman, Karl Wilhelm Georg von
- Grommet
- Gromwell
- Grongar Hill
- Groningen (province)
- Groningen (town)
- Gronlund, Lawrence
- Grosart, Alexander Balloch
- Grotesque
- Groth, Klaus
- Groth, Paul
- Grotius, Hugo
- Groton
- Grottaglie
- Grotte
- Grottger, Arthur von
- Ground-Tackle
- Ground-Thrush
- Group
- Grouper
- Groups
- Grouse
- Grouse's Day, Saint
- Grousset, Paschal
- Grove, George
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- Guadalupe Hidalgo, Treaty of
- Gualeguaychú
- Guam
- Guan
- Guanabacoa
- Guarini, Giovanni Battista
- Gussenbauer, Karl
- Güssfeldt, Paul
- Gustavia
- Gustavus I. Vasa
- Gustavus II. Adolphus
- Gustavus III.
- Gustavus IV. Adolphus
- Gustavus Adolphus Society
- Gustavus Vasa
- Güstrow
- Gutenberg, Johannes
- Guthe, Hermann
- Guthrie
- Gutzkow, Karl
- Gützlaff, Karl F. A.
- Gyllembourg-Ehrensvärd, Thomasine Christine
- Gyllenborg, Karl
- Gymkhana
- Gymnasia and Realgymnasia
- Gymnasiarch
- Gymnastics
- Gymnema
- Gymnocladus
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- Hadik von Futak, Andreas, Count
- Hading, Jane
- Hadith
- Hadjemis
- Hadley
- Hadley, Arthur Twining
- Hagenbach, Karl Rudolf
- Hagenbach, Peter von
- Hagenbeck, Karl
- Hager, Albert David
- Hager, Hans Hermann Julius
- Hagerstown
- Hagersville
- Hagfish
- Haggada
- Haileybury College
- Haillan, Bernard de Girard
- Hailmann, William Nicholas
- Haimonskinder
- Hajj
- Hajji
- Hajji Baba of Ispahan
- Hajji Khalfah, Mustafa ibn Abdallah Katib Tchelebi
- Hake, Karl von
- Hakim ibn Allah
- Halacha
- Hale, John Parker
- Half-Breeds
- Hall, Charles Francis
- Halstead, Murat
- Hänel, Albert
- Hanfstängl, Franz
- Hang-chow
- Hansch, Anton
- Hanseatic League, The
- Hansemann, David Justus Ludwig
- Haran
- Harar
- Haratin
- Haraucourt, Edmond
- Harbaugh, Henry
- Harbin
- Harbor
- Harbor (judicially defined)
- Harbor Grace
- Harboring
- Harborne, William
- Hardenberg, Karl August, Prince
- Harden-Hickey, James Aloysius
- Harderwijk
- Hardcastle
- Harding, Chester
- Harding, James Duffield
- Harding, Karl Ludwig
- Harding, Stephen
- Harmonic Stop
- Harmonious Blacksmith, The
- Harmonists
- Harmonium
- Harris, William Snow
- Harris, William Torrey
- Harris, William Victor
- Harris Buck
- Harrisburg (Illinois)
- Harrisburg (Pennsylvania)
- Harrison (Arkansas)
- Harrison (New Jersey)
- Harrison, Benjamin (patriot)
- Harrison, Benjamin (President)
- Harrison, William Henry
- Hartel, Wilhelm von
- Hartenstein, Gustav
- Hartford
- Hartford, The
- Hartford City
- Hartford Convention
- Hartford Theological Seminary
- Hartig, Franz, Count
- Hartig, Georg Ludwig
- Hartig, Robert
- Hartig, Theodor
- Hartlib, Samuel
- Hartmann, Karl Robert Eduard von
- Harvard, John
- Harvard University
- Hasan and Hosein
- Hasenauer, Karl, Baron von
- Hasenclever, Johann Peter
- Hasenclever, Wilhelm
- Hasenpflug, Karl
- Häser, Heinrich
- Hashish
- Hasidæans
- Hatch, Edwin
- Haupt, Erich
- Haupt, Herman
- Haupt, Lewis Muhlenberg
- Haupt, Moritz
- Haviland, William
- Havildar
- Havin, Léonor Joseph
- Havlíček, Karel
- Havre, Le
- Havre de Grace
- Hawaiian Islands
- Hawarden
- Haweis, Hugh Reginald
- Haweis, Mary Eliza (Joy)
- Hawes, Stephen
- Hay
- Hay, John
- Hay-Pauncefote Treaty
- Hayes, Rutherford Birchard
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- Heck, Barbara
- Hecker, Friedrich Karl Franz
- Heckscher, Johann Gustav Wilhelm Moritz
- Hedberg, Frans Teodor
- Hedda Gabler
- Hedding, Elijah
- Heddle
- Hedenstierna, Karl Joseph Alfred
- Hedge
- Hedge, Frederic Henry
- Heine, Heinrich
- Heinzen, Peter
- Heir of Linne
- Heis, Eduard
- Heise, Peder
- Heiss, Michael
- Hejira
- Hele, Peter
- Helen
- Helen: A Tale
- Helena (Arkansas)
- Helena (Montana)
- Heliand
- Hellriegel, Hermann
- Hellwald, Ferdinand von
- Hellwald, Friedrich von
- Hemans, Felicia Dorothea (Browne)
- Hemlock
- Hemlock-tree
- Hemp
- Hemp, Bowstring
- Hemp, Indian
- Hemp, Manila
- Hemp, Sisal
- Hemp, Sunn
- Hemp-agrimony
- Hempel, Charles Julius
- Herbart, Johann Friedrich
- Hercynian Forest
- Herd, David
- Herder, Bartholomäus
- Herder, Johann Gottfried von
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