- Hungarian Ministry of the Interior1
- Hunt, R. N. Carew1
- Information Services Department1
- Ioann1
- Isherwood, Christopher1
- Judit, Miklósy1
- Kahn, Albert Eugene1
- Karácsonyi, Béla1
- Kelly, David1
- Kemény, István1
- Kenworthy, Leonard S.1
- Kirby, E. Stuart1
- Koerber, Hans Joachim von1
- Kovács, Endre1
- Kościałkowski, Stanisław1
- Lenin, Vladimir Ilʹich1
- Leverkuehn, Paul1
- Lochtin, Stefan1
- Luknitskii, Pavel1
- MacColl, René1