Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriiuv » peteriiuv (Expand Search), petriiiuv (Expand Search), petruiiuv (Expand Search)
petriiiouv » peteriiiouv (Expand Search), petriiiiouv (Expand Search), petruiiiouv (Expand Search)
petriuuou » peteriuuou (Expand Search), petriiuuou (Expand Search), petruiuuou (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 ((((petriiov OR petruov) OR peterov) OR (petriiuv OR petriiiouv)) OR (petriuuou OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiov OR petruov) OR peterov) OR (petriiuv OR petriiiouv)) OR (petriuuou OR petr)) o.s.*".