Perhaps you should try some spelling variations:
peterow » petrow (Expand Search)
petrio » petri (Expand Search), petris (Expand Search), petro (Expand Search), peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search), petri (Expand Search), petru (Expand Search), petris (Expand Search)
peteroi » peterdi (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((peterow OR petrio) o) OR (((petr OR peteroi) OR ((peteru OR petriu) OR petriu)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peterow OR petrio) o) OR (((petr OR peteroi) OR ((peteru OR petriu) OR petriu)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop (((peterow OR petrio) o) OR (((petr OR peteroi) OR ((peteru OR petriu) OR petriu)) _)). s.*.