Perhaps you should try some spelling variations:
petriov » petrov (Expand Search), petriiov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petriuv » petriiuv (Expand Search), petruiuv (Expand Search), petroiuv (Expand Search)
petruuuuiov » petriuuuuiov (Expand Search), petruuuuuiov (Expand Search), petrouuuuiov (Expand Search)
petriuou » petriiuou (Expand Search), petruiuou (Expand Search), petroiuou (Expand Search)
petruiiuou » petriuiiuou (Expand Search), petruuiiuou (Expand Search), petrouiiuou (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (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 (((petriov OR petriuv) OR petruuuuiov) OR ((petriuou OR petruiiuou) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriov OR petriuv) OR petruuuuiov) OR ((petriuou OR petruiiuou) OR (petr OR peter))) o.s.*".