[Berlin] Düppel (after Dybbøl, South Jutland, Denmark) is the name of a neighbourhood as well as of an adjacent forest in the borough of Steglitz-Zehlendorf in southwestern Berlin, Germany. The neighbourhood itself is a part of the Zehlendorf locality. ==History== Archaeological finds indicate a Slavic settlement established about 1170. I...
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http://en.wikipedia.org/wiki/Düppel_(Berlin)

German code name for radar chaff, used by the Royal Air Force as Window, possibly from düpieren (to dupe). or from a German town of the same name, where it was allegedly first found near.
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http://www.translationdirectory.com/glossaries/glossary261.php
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