Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petruoio (Expand Search)
petruuiio » peteruuiio (Expand Search), petriuuiio (Expand Search), petruuuiio (Expand Search)
petriuou » peteriuou (Expand Search), petriiuou (Expand Search), petruiuou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 peteruiov) OR petriv) OR (((petroio OR petruuiio) OR petriuou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriov OR peteruiov) OR petriv) OR (((petroio OR petruuiio) OR petriuou) OR petr)) o.s.*".