Perhaps you should try some spelling variations:
petroiv » petrov (Expand Search), peteroiv (Expand Search), petruoiv (Expand Search), petrooiv (Expand Search)
petero » peter (Expand Search), peters (Expand Search), petro (Expand Search)
petrio » petris (Expand Search), petro (Expand Search), peterio (Expand Search), petruio (Expand Search), petroio (Expand Search)
petriiiov » peteriiiov (Expand Search), petruiiiov (Expand Search), petroiiiov (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 (((peteriiov OR petriiiov) OR petroiv) OR ((petero OR petrio) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peteriiov OR petriiiov) OR petroiv) OR ((petero OR petrio) OR (petr OR petri))) o.s.*".