Jack Thiessen

Jack Thiessen
Born(1931-04-14)14 April 1931
Grunthal, Manitoba, Canada
Died9 October 2022(2022-10-09) (aged 91)
Steinbach, Manitoba, Canada
OccupationLexicographer
Alma materUniversity of Winnipeg, University of Marburg
Period1970s–2020s
Notable worksMennonite Low German Dictionary
Spouse
(m. 1991)

John Peter Thiessen (14 April 1931 – 9 October 2022) was a Canadian Russian Mennonite teacher, translator, and writer from Manitoba. Alongside Arnold Dyck and Reuben Epp, he was an important contributor to the development of Mennonite Low German literature, as well as one of the language's most prominent lexicographers.