Perhaps you should try some spelling variations:
petriv » petris (Expand Search), petrov (Expand Search), peteriv (Expand Search), petruiv (Expand Search), petroiv (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)
petruio » peteruio (Expand Search), petruuio (Expand Search), petrouio (Expand Search)
petriio » peteriio (Expand Search), petruiio (Expand Search), petroiio (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 (petriv OR ((peteru OR ((petruio OR petriio) OR petriio)) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriv OR ((peteru OR ((petruio OR petriio) OR petriio)) OR (petr OR petri))) o.s.*".