Edwin Benson (Ma-doke-wa-des-she, Iron Bison) is an educator and the last speaker of the Mandan language. He was born in 1931 on the Fort Berthold Reservation in North Dakota. He currently teaches Mandan at Twin Buttes Elementary School, and was awarded an honorary doctorate from the University of North Dakota in 2009. He has been involved in efforts to teach the basics of Mandan to youth.
- "Edwin Benson, Language Teacher". Video and transcript of Benson teaching Mandan (in English and Mandan). Retrieved 2009-06-11.
- Jodi Rave (2009-05-11). "The last speaker: UND to honor Mandan, last to speak Nu'eta as 1st language". The Missoulian (Missoula, MT). Retrieved 2012-07-09.