Diplomats — reference index 10
- Mary Frances Berry
- Mary Tyler Peabody Mann
- Masanao Hanihara — Japan
- Masaoki Shinmi — Japan
- Masayuki Tani — Japan
- Masood Khan — Pakistan
- Mateo de la Serna — Spain
- Matías Romero — Mexico
- Maurice Couve de Murville — France
- Mauricio López Roberts — Spain
- Mauricio Yadarola — Argentina
- Maurício Nabuco — Brazil
- Mauro Vieira — Brazil
- Maury Gurgel Valente — Brazil
- Mavrovani Bey — Türkiye
- Max von Thielmann — Germany
- Maxim Litvinov — Russia
- Mário da Costa Guimarães — Brazil
- Mário de Pimentel Brandão — Brazil
- Mário Gibson Alves Barboza — Brazil
- Meera Shankar — India
- Mehmed Ali Bey — Türkiye
- Mehmet Münir Ertegün — Türkiye
- Mehmet Rifat Bey — Türkiye
- Meir Rosenne — Israel
- Melih Esenbel — Türkiye
- Michael Cook — Australia
- Michael Herzog — Israel
- Michael Kergin — Canada
- Michael Oren — Israel
- Michael Tatham — United Kingdom
- Michael Thawley — Australia
- Michael Wilson — Canada
- Miguel Ángel de la Campa — Cuba
- Miguel Basáñez Ebergenyi — Mexico
- Miguel Maria Lisboa — Brazil
- Miguel Suárez Guanes — Spain
- Miguel Tacón y García de Lisón — Spain
- Mikael Imru — Ethiopia
- Mike Pompeo
- Mikhail Bartholomei — Russia
- Mikhail Menshikov — Russia
- Millard Fillmore
- Min Yeong-ik — Korea
- Minasse Haile — Ethiopia
- Mirza Abul Hassan Ispahani — Pakistan
- Mninwa Johannes Mahlangu — South Africa
- Moekarto Notowigdo — Indonesia
- Mohamed Amine Youssef Bey — Egypt
- Mohamed Hamdy ElMolla — Egypt
- Mohamed Kamel Abdul Rahim — Egypt
- Mohamed Sadiq al-Mashat — Iraq
- Mohamed Tawfik — Egypt
- Mohammed Hussein Al Shaali — UAE
- Moreau-Faverney — France
- Morito Morishima — Japan
- Moshe Arad — Israel
- Moshe Arens — Israel
- Mostafa Kamel — Egypt
- Motaz Zahran — Egypt
- Mouhyi al-Khateeb — Iraq
- Moussa Al-Shabandar — Iraq
- Mozart Gurgel Valente Junior — Brazil
- Muhammad Ali Bogra — Pakistan
- Muhammad Lutfi — Indonesia
- Mukhamed Bobir Malikov — Uzbekistan
- Munemitsu Mutsu — Japan
- Munenori Terashima — Japan
- Mustafa Şekip Bey — Türkiye
- Mustafa Tahsin Bey — Türkiye
- Münci Bey — Türkiye
- Mykhailo Reznik — Ukraine
- Nabi Şensoy — Türkiye
- Nabil Fahmy — Egypt
- Najmuddin A. Sheikh — Pakistan
- Namık Tan — Türkiye
- Nani A. Palkhivala — India
- Napoleão de Siqueira Lamaix — Brazil
- Naresh Chandra — India
- Nasir al-Hani — Iraq
- Nathalie Broadhurst — France
- Navtej Sarna — India
- Nawabzada A. M. Raza — Pakistan
- Nazar Al-Khirullah — Iraq
- Ndumiso Ndima Ntshinga — South Africa
- Nehushtan — Israel
- Nelson Mandela
- Nestor Forster — Brazil
- Nesuhi Ertegün
- Nevile Montagu Butler — United Kingdom
- Nick Parkinson — Australia
- Nicola Clase — Sweden
- Nicolas Khalil Bey — Egypt
- Nicolás Arroyo — Cuba
- Nidya Kartikasari — Indonesia
- Nikolai Novikov — Russia
- Nikolai Shishkin — Russia
- Nirupama Rao — India
- Nizar Hamdoon — Iraq
- Nobuhiko Ushiba — Japan