Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petroiov (Expand Search), periov (Expand Search)
petrouiiov » peterouiiov (Expand Search), petroouiiov (Expand Search), perouiiov (Expand Search)
petrv » peterv (Expand Search), petrov (Expand Search), perv (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (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 petrouiiov) OR peruv) OR (petrv OR peruv)) OR ((petru OR petri) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriov OR petrouiiov) OR peruv) OR (petrv OR peruv)) OR ((petru OR petri) OR petr)) o.s.*".