Perhaps you should try some spelling variations:
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petris » peteris (Expand Search), petruis (Expand Search), petrois (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petriu » peteriu (Expand Search), petruiu (Expand Search), petroiu (Expand Search), petru (Expand Search)
petrioi » peterioi (Expand Search), petruioi (Expand Search), petroioi (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (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 (petr OR ((petris OR ((peteru OR petri) OR petriu)) OR (petrioi OR peterdi))) _. s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petr OR ((petris OR ((peteru OR petri) OR petriu)) OR (petrioi OR peterdi))) _. s.*".