Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petruoio (Expand Search)
petruoio » peteruoio (Expand Search), petriuoio (Expand Search), petruuoio (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (Expand Search)
petruou » peteruou (Expand Search), petriuou (Expand Search), petruuou (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 ((peteriov OR peteriv) OR ((((petroio OR petruoio) OR petriio) OR petruou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriov OR peteriv) OR ((((petroio OR petruoio) OR petriio) OR petruou) OR petr)) o.s.*".