Lethen was married to Loes Scholtheis (* 1941)DNB-article to Loes Scholtheis, http://d-nb.info/gnd/1139447939, retrieved 27 September 2022. from 1964. The couple separated in 1984."Andrea Klimt (2021): Lethen, Helmut", Deutsches Literatur-Lexikon Online, retrieved 27 September 2022. He is now married to Caroline Sommerfeld (* 1975), who has been an activist of the Identitarian movement since 2015. The couple has three sons...
