Perhaps you should try some spelling variations:
gerhardt » gerhard (Expand Search), gebhardt (Expand Search), eberhardt (Expand Search), ggerhardt (Expand Search)
ggerhardt » ggerhard (Expand Search), ggebhardt (Expand Search), geberhardt (Expand Search), gerhard (Expand Search), eberhardt (Expand Search), gebhardt (Expand Search), gggerhardt (Expand Search)
ebgerhardt » ebgerhard (Expand Search), ebgebhardt (Expand Search), ebeberhardt (Expand Search), ebggerhardt (Expand Search), eberhardt (Expand Search), eberhard (Expand Search), engelhardt (Expand Search)
erhard » gerhard (Expand Search)
ebeberhardt » ebebgerhardt (Expand Search), eberhardt (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 ggerhardt) OR erhard) OR (ebgerhardt OR ebeberhardt)) (hartmann" OR hottmann")~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(((gerhardt OR ggerhardt) OR erhard) OR (ebgerhardt OR ebeberhardt)) (hartmann\" OR hottmann\")*".
• Removing quotes may allow a broader search: (((gerhardt OR ggerhardt) OR erhard) OR (ebgerhardt OR ebeberhardt)) (hartmann OR hottmann )*.