title: Deffner
text: # Deffner
  
  Deffner is a surname. Notable people with the surname include:
  
  * Michael Deffner (1848–1934), German classical philologist and linguist
  * Karl Deffner (1817–1877), German manufacturer, politician and geologist
  * Sebastian Deffner, German theoretical physicist and a professor in the Department of Physics at the University of Maryland
  