Perhaps you should try some spelling variations:
petruov » petrov (Expand Search), peteruov (Expand Search), petrouov (Expand Search), peruov (Expand Search), pentruov (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search)
petrowna » peterowna (Expand Search), petroowna (Expand Search), perowna (Expand Search), petrona (Expand Search), petrovna (Expand Search)
petrow » peterow (Expand Search), petroow (Expand Search), perow (Expand Search), petro (Expand Search), petrov (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (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 (petruov OR ((petr OR (petru OR (petrowna OR petrow))) OR petri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petruov OR ((petr OR (petru OR (petrowna OR petrow))) OR petri)) o.s.*".