Perhaps you should try some spelling variations:
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search)
petrou » peterou (Expand Search), petroou (Expand Search), perou (Expand Search), petro (Expand Search), petrov (Expand Search), petrow (Expand Search)
petroi » peteroi (Expand Search), petrooi (Expand Search), peroi (Expand Search), petro (Expand Search), petrov (Expand Search), petrow (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
peteroi » peterdi (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 ((petru OR petrou) OR ((petroi OR petri) OR peteroi))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop (petr OR ((petru OR petrou) OR ((petroi OR petri) OR peteroi))) _. s.*.