Diplomats — reference index 6
- Günther van Well — Germany
- H. Denant — France
- H. H. Wrong — Canada
- Hahm Pyong-choon — Korea
- Hamad Abdel Rahman Al Madfa — UAE
- Hamad Abdul Rahman Al Madfa — UAE
- Hamilton Fish
- Han Duck-soo — Korea
- Han Seung-soo — Korea
- Han Sung-joo — Korea
- Han Xu — China
- Hans Luther — Germany
- Hans Thomsen — Germany
- Hans-Heinrich Dieckhoff — Germany
- Harald Langmead Taylor Taswell — South Africa
- Harold Forsyth — Peru
- Harry S. Truman
- Harry Schwarz — South Africa
- Harry Thomson Andrews — South Africa
- Harsh Vardhan Shringla — India
- Hasan Murat Mercan — Türkiye
- Hawkling Yen — China
- Heinrich von Offenberg — Russia
- Heinz Krekeler — Germany
- Henri Bonnet — France
- Henri Hoppenot — France
- Henri Mercier — France
- Henrik Liljegren — Sweden
- Henrique Cavalcanti de Albuquerque — Brazil
- Henrique Rodrigues Valle — Brazil
- Henry Alfred Kissinger
- Henry Bérenger — France
- Henry Bulwer — United Kingdom
- Henry Clay
- Henry de Bellonnet — France
- Henry Getty Chilton — United Kingdom
- Henry L. Stimson
- Henry Percival Dodge
- Henry Stephen Fox — United Kingdom
- Henry Unwin Addington — United Kingdom
- Herbert Hoover
- Herman Eriksson — Sweden
- Herman Lagercrantz — Sweden
- Hermann Speck von Sternburg — Germany
- Hernán Velarde — Peru
- Hervé Alphand — France
- Héctor Timerman — Argentina
- Hilario Rivas y Salmón — Spain
- Hildebrando Pompeu Pinto Accioly — Brazil
- Hillary Rodham Clinton
- Hipólito Jesús Paz — Argentina
- Hiroshi Saitō — Japan
- Ho Chi Minh
- Hollington K. Tong — China
- Hong Seok-hyun — Korea
- Honorio Pueyrredón — Argentina
- Horst Grunert — Germany
- Howard Beale — Australia
- Hu Shih — China
- Huang Zhen — China
- Hubert de Bèsche — Sweden
- Hugo B. Margáin Gleason — Mexico
- Hugo de Zela — Peru
- Humberto Fernández Dávila — Peru
- Husain Haqqani — Pakistan
- Hussein Mahmoud Rady — Egypt
- Hüseyin Kazım Bey — Türkiye
- Hüseyin Ragıp Baydur — Türkiye
- Hüseyin Tevfik Paşa — Türkiye
- Hyun Hong-choo — Korea
- I. J. Bahadur Singh — India
- Ibrahim Al-Sowayel — Saudi Arabia
- Ibrahim Ratib Bey — Egypt
- Ichiro Fujisaki — Japan
- Ida Bagus Made Bimantara — Indonesia
- Ignacio de Avellar Barbosa da Silva — Brazil
- Ignacio García — Peru
- Ignacio L. Bonillas — Mexico
- Ignacio Mariscal — Mexico
- Ilhomjon Nematov — Uzbekistan
- Immo Stabreit — Germany
- Isaburō Yoshida — Japan
- Ismail Esau — South Africa
- Ismail Kamel Bey — Egypt
- Itamar Rabinovich — Israel
- Itō Hirobumi
- Iwan Freddy Hari Susanto — Indonesia
- Jabir Habeb Jabir — Iraq
- Jacques Andréani — France
- Jacques Kosciusko-Morizet — France
- Jacques Truelle — France
- Jaime Alba Delibes — Spain
- Jaime Argüelles Armada — Spain
- Jaime de Ojeda y Eiseley — Spain
- Jake Warren — Canada
- Jalil Abbas Jilani — Pakistan
- James A. Baker III
- James A. Garfield
- James Bryce — United Kingdom
- James Buchanan