Perhaps you should try some spelling variations:
gerhardt » gerhard (Expand Search), gebhardt (Expand Search), ggerhardt (Expand Search)
eberhardt » ebgerhardt (Expand Search)
erhard » gerhard (Expand Search)
engelhornt » engelhorn (Expand Search), engelhorns (Expand Search)
engelhardt » engelhornt (Expand Search)
engelhard » engelhorn (Expand Search)
hauptmann » hartmann (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((gerhardt OR eberhardt) OR erhard) OR (engelhardt OR (engelhornt OR engelhard))) hauptmann~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((gerhardt OR eberhardt) OR erhard) OR (engelhardt OR (engelhornt OR engelhard))) hauptmann".
• Adding a wildcard symbol may retrieve word variants: (((gerhardt OR eberhardt) OR erhard) OR (engelhardt OR (engelhornt OR engelhard))) hauptmann*.