Faithful
Treusch is the family name of
- Gerburg Treusch-Dieter (1939–2006), German sociologist and cultural scientist
- Gertrud Treusch (1902–1999), German Reichsfrauenführer in the National Socialist German Reich
- Hermann Treusch (* 1937), German actor, general manager and director
- Joachim Treusch (* 1940), German physicist and science manager; President of Jacobs University Bremen
- Martina Treusch , German author for film and television
and the name of the
- Hessian noble family of the Treusch von Buttlar-Brandenfels