Military
- Grenier, Chevalier
- Grierson, Alice Kirk
- Grierson, Benjamin Henry
- Guadalupe García, José de
- Guerrero, Brigido
- Gwynne, James C.
- Hall, Robert
- Harby, Levi Charles Meyers
- Harcourt, Edward
- Harmon, Leonard Roy
- Harris, Abraham
- Hawkins, Joseph M.
- Headley, Alexander Manford
- Hensley, William Richardson
- Hereford Military Reservation and Reception Center
- Herrera, Blas Maria
- Herrera, Silvestre Santana
- Herron, Henry Nelson
- Hersee, William Daniel
- Hext, Sam
- Hite, Robert Lowell
- Hobby, Oveta Culp
- Hoffmann, Gustav
- Holland, Milton M.
- Holtz, Helmuth Heinrich Diedrich
- Holzinger, Juan Jose
- Houston Riot of 1917
- Howard Hughes Airport
- Huerta, Victoriano
- Hutchings, Henry
- Jackson, Thomas
- Jackson, William Daniel
- James, Fleming Wills
- James, John Garland
- Jenkins, John Holland
- Jiménez, Abelardo [Cha Cha]
- Joe
- John
- Johns, Clement Reed
- Johnson, Adam Rankin
- Johnson, Andrew
- Johnson, Edward Isaac
- Johnston, Eliza Griffin
- Jones Creek, Battle of
- Jones, John B.
- Jones, Oliver
- Jones, Randal
- Karpeles, Leopold
- Kaufman, David Spangler
- Keene, George Lawson
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