Perhaps you should try some spelling variations:
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petris » petriis (Expand Search), petruis (Expand Search), petrois (Expand Search), petri (Expand Search)
petroou » petrioou (Expand Search), petruoou (Expand Search), petrooou (Expand Search)
petrov » petriov (Expand Search), petruov (Expand Search), petroov (Expand Search), petro (Expand Search)
petruiov » petriuiov (Expand Search), petruuiov (Expand Search), petrouiov (Expand Search)
petriuiov » petriiuiov (Expand Search), petruiuiov (Expand Search), petroiuiov (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petr OR peter) OR (petris OR (petroou OR (petrov OR (petruiov OR petriuiov))))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr OR peter) OR (petris OR (petroou OR (petrov OR (petruiov OR petriuiov))))) _. s.*.