Perhaps you should try some spelling variations:
gerhardt » gerhard (Expand Search), gebhardt (Expand Search), ggerhardt (Expand Search)
erhard » gerhard (Expand Search)
eberhardt » ebgerhardt (Expand Search)
ebgerhard » ebggerhard (Expand Search), eberhard (Expand Search), gerhard (Expand Search)
engelhard » engelhardt (Expand Search)
engelhorn » engelhorns (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 erhard) OR ((eberhardt OR ebgerhard) OR (engelhard OR engelhorn))) hauptmann~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((gerhardt OR erhard) OR ((eberhardt OR ebgerhard) OR (engelhard OR engelhorn))) hauptmann".
• Adding a wildcard symbol may retrieve word variants: ((gerhardt OR erhard) OR ((eberhardt OR ebgerhard) OR (engelhard OR engelhorn))) hauptmann*.