Dederich
Dederich is the family name of the following people:
- Andreas Dederich (1804–1886), German high school teacher and historian, honorary citizen of the city of Emmerich am Rhein
- Charles E. Dederich (1913–1997), American founder of Synanon, a self-help organization for drug addicts
- Markus Dederich (* 1960), German educational scientist and curative teacher