Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petru (Expand Search), petero (Expand Search), petrio (Expand Search), petruo (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (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 (peterv OR (((petriov OR peteriov) OR petruv) OR ((petro OR petrio) OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterv OR (((petriov OR peteriov) OR petruv) OR ((petro OR petrio) OR petr))) o.s.*".