- Gyapay, Gábor1
- Halliwell, Leslie1
- Halpern, Abraham M.1
- Halévy, Elie1
- Hampshire, Stuart1
- Hašek, Jaroslav1
- Herling-Grudziński, Gustaw1
- Historical Archives of the Hungarian State Security1
- Howe, Ellic1
- Hun, Péter1
- Héderváry, Claire de1
- IAroslavskii, Emel'ian1
- IArygin, Andrei Fedorovich1
- Index on Censorship1
- Information Services Department1
- Ioann1
- Ivens, Joris1
- Iwaniuk, Wacław1
- Jacewicz, Alfons1
- Jancsó, Miklós1