Perhaps you should try some spelling variations:
petrow » petro (Expand Search), petrowna (Expand Search), peterow (Expand Search), petriow (Expand Search), petruow (Expand Search)
petrov » petro (Expand Search), peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petriovw » peteriovw (Expand Search), petriiovw (Expand Search), petruiovw (Expand Search)
petroov » peteroov (Expand Search), petrioov (Expand Search), petruoov (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), petri (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 (((petriovw OR petrow) o) OR ((((petroov OR petrov) OR petr) OR peteri) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriovw OR petrow) o) OR ((((petroov OR petrov) OR petr) OR peteri) _)). s.*".