Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petruiiov » peteruiiov (Expand Search), petruuiiov (Expand Search), petrouiiov (Expand Search)
petrov » peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petruo » peteruo (Expand Search), petruuo (Expand Search), petrouo (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 ((((petriov OR petruiiov) OR peruv) OR (petrov OR peruv)) OR ((petruo OR petri) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriov OR petruiiov) OR peruv) OR (petrov OR peruv)) OR ((petruo OR petri) OR petr)) o.s.*".