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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
Surname listThis page lists people with the surnameDeffner. If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link.
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Surname listThis page lists people with the surname Deffner.