Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petruuv » peteruuv (Expand Search), petriuuv (Expand Search), petruuuv (Expand Search)
petruiuiov » peteruiuiov (Expand Search), petriuiuiov (Expand Search), petruuiuiov (Expand Search)
petruiuo » peteruiuo (Expand Search), petriuiuo (Expand Search), petruuiuo (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (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 ((petruuv OR (petruiuiov OR peteriov)) OR ((petruiuo OR (petroi OR perui)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuv OR (petruiuiov OR peteriov)) OR ((petruiuo OR (petroi OR perui)) OR petr)) o.s.*".