Leuchtenberg is a municipality in the district of Neustadt in Bavaria in Germany, essentially a suburb of nearby Weiden in der Oberpfalz, and a historical region in Old Germany governed by the Landgrave of Leuchtenberg. ...
Found on http://en.wikipedia.org/wiki/Leuchtenberg
In the middle ages Leuchtenberg was an independent landgraviate of Germany, which, by the extinction of the male line, fell to Bavaria in 1646. From it Eugene Beauharnais took the title of Duke of Leuchtenberg.
Found on http://www.probertencyclopaedia.com/browse/CXL.HTM
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