Perhaps you should try some spelling variations:
petrow » petro (Expand Search), petrowna (Expand Search), peterow (Expand Search), petruow (Expand Search), petroow (Expand Search)
petrovw » petrow (Expand Search), peterovw (Expand Search), petruovw (Expand Search), petroovw (Expand Search)
petrov » petro (Expand Search), peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), peters (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: fop (((petrovw OR petrow) o) OR ((((petrov OR peterov) OR (petr OR petri)) OR peteri) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petrovw OR petrow) o) OR ((((petrov OR peterov) OR (petr OR petri)) OR peteri) _)). s.*".