- Granville-Barker, Harley
- Greece
- Greely, Adolphus Washington
- Gregory, Augusta, Lady
- Gregory, Robert
- Grenades
- Gretna
- Grey, Albert Henry George Grey, 4th Earl
- Grey of Fallodon, Edward Grey, 1st Viscount
- Grierson, Sir James Moncrieff
- Griffith, Sir Samuel Walker
- Groener, Wilhelm
- Grossmith, George
- Grossmith, Weedon
- Grundy, Sydney
- Guam
- Guatemala
- Gubernatis, Angelo de, Count
- Guchkov, Alexander
- Guerrini, Olindo
- Guiana
- Guild Socialism
- Guillaumat, Marie Louis Adolphe
- Guise, Battle of
- Guitry, Lucien Germain
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- Günther, Albert Charles Lewis Gotthilf
- Gurko, Vasili
- Gustavus V.
- Guthrie, Charles John Guthrie, Baron
- Gwalior, Sir Mahdo Rao Sindhia, Maharaja of
- Gwatkin, Henry Melvill
- Haag, Carl
- Haase, Friedrich
- Haase, Hugo
- Hacker, Arthur
- Hadfield, Sir Robert Abbott
- Hadley, Arthur Twining
- Hadow, Sir William Henry
- Haeckel, Ernst Heinrich
- Hagenbeck, Carl
- Haggard, Sir Henry Rider
- Haig, Douglas Haig, 1st Earl
- Hainisch, Michael
- Haiti
- Haldane, Richard Burton Haldane, 1st Viscount
- Hale, George Ellery
- Hales, John Wesley
- Halifax, Charles Lindley Wood, 2nd Viscount
- Halifax
- Halle, Wilma Maria Francisca, Lady
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- Halsbury, Hardinge Stanley Giffard, 1st Earl of
- Hamburg
- Hamilton, Sir Ian Standish Monteith
- Hamilton
- Hammann, Otto
- Hammarskjöld, Hjalmar
- Hankow
- Hann, Julius von
- Hanotaux, Albert Auguste Gabriel
- Hara, Takashi
- Harcourt, Lewis Vernon Harcourt, 1st Viscount
- Hardie, James Keir
- Harding, Warren Gamaliel
- Hardinge of Penshurst, Charles Hardinge, 1st Baron
- Hardy, Thomas
- Hare, Sir John
- Harlan, John Marshall
- Harpignies, Henri
- Harrigan, Edward
- Harrison, Frederic
- Hart, Sir Robert
- Hartley, Sir Charles Augustus
- Hartley, Jonathan Scott
- Harvard University
- Harvey, George
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- Harvey, Sir John Martin
- Hauck, Albert
- Hauptmann, Gerhart
- Havana
- Haverfield, Evelina
- Haverfield, Francis John
- Hawaii
- Hay, Ian
- Hayashi, Tadasu, Count
- Hazlitt, William Carew
- Health Ministry
- Healy, Timothy Michael
- Hearst, William Randolph
- Heart and Lung Surgery
- Heart Diseases
- Heat
- Heaton, Sir John Henniker
- Hedin, Sven Anders
- Heeringen, Josias von
- Heijermans, Hermann
- Heinemann, William
- Hejaz Railway
- Helfferich, Karl
- Heligoland Bight
- Helmet
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